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Arc Document Solutions, Inc. – ‘10-K’ for 12/31/19 – ‘EX-101.LAB’

On:  Thursday, 3/12/20, at 2:17pm ET   ·   For:  12/31/19   ·   Accession #:  1305168-20-4   ·   File #:  1-32407

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  As Of               Filer                 Filing    For·On·As Docs:Size

 3/12/20  Arc Document Solutions, Inc.      10-K       12/31/19   84:8.2M

Annual Report   —   Form 10-K   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML    702K 
 2: EX-10.43    Material Contract                                   HTML     29K 
 3: EX-21.1     Subsidiaries List                                   HTML     50K 
 4: EX-23.1     Consent of Experts or Counsel                       HTML     25K 
 5: EX-31.1     Certification -- §302 - SOA'02                      HTML     30K 
 6: EX-31.2     Certification -- §302 - SOA'02                      HTML     30K 
 7: EX-32.1     Certification -- §906 - SOA'02                      HTML     26K 
 8: EX-32.2     Certification -- §906 - SOA'02                      HTML     26K 
40: R1          Document and Entity Information                     HTML     58K 
69: R2          Consolidated Balance Sheets                         HTML    130K 
60: R3          Consolidated Balance Sheets (Parenthetical)         HTML     54K 
15: R4          Consolidated Statements of Operations               HTML     95K 
37: R5          Consolidated Statements of Comprehensive Income     HTML     49K 
66: R6          Consolidated Statements of Equity Statement         HTML     63K 
57: R7          Consolidated Statements of Cash Flows               HTML    126K 
18: R8          Description of Business and Basis of Presentation   HTML     32K 
36: R9          Summary of Significant Accounting Policies          HTML    160K 
42: R10         Restructuring                                       HTML     28K 
20: R11         Goodwill and Other Intangibles                      HTML     74K 
64: R12         Property and Equipment                              HTML     38K 
74: R13         Long-Term Debt                                      HTML     53K 
43: R14         Commitments and Contingencies                       HTML     29K 
21: R15         Leasing                                             HTML    379K 
65: R16         Income Taxes                                        HTML    108K 
75: R17         Employee Stock Purchase Plan and Stock Plan         HTML    105K 
45: R18         Retirement Plans                                    HTML     28K 
19: R19         Fair Value Measurements                             HTML     42K 
49: R20         Summary of Significant Accounting Policies          HTML    175K 
                (Policies)                                                       
76: R21         Summary of Significant Accounting Policies          HTML    115K 
                (Tables)                                                         
30: R22         Goodwill and Other Intangibles (Tables)             HTML     72K 
24: R23         Property and Equipment (Tables)                     HTML     41K 
50: R24         Long-Term Debt (Tables)                             HTML     44K 
77: R25         Leasing (Tables)                                    HTML    143K 
31: R26         Income Taxes (Tables)                               HTML     98K 
25: R27         Employee Stock Purchase Plan and Stock Plan         HTML    102K 
                (Tables)                                                         
48: R28         Fair Value Measurements (Tables)                    HTML     40K 
78: R29         Summary of Significant Accounting Policies - Cash   HTML     30K 
                Equivalents (Details)                                            
73: R30         Summary of Significant Accounting Policies -        HTML     39K 
                Concentrations of Credit Risk and Significant                    
                Vendors (Details)                                                
62: R31         Summary of Significant Accounting Policies -        HTML     33K 
                Summary of Allowance for Doubtful Accounts                       
                (Details)                                                        
23: R32         Summary of Significant Accounting Policies -        HTML     62K 
                Narrative (Details)                                              
47: R33         Summary of Significant Accounting Policies -        HTML     56K 
                Property and Equipment and Impairment of                         
                Long-Lived Assets (Details)                                      
72: R34         Summary of Significant Accounting Policies -        HTML     27K 
                Goodwill and Other Intangible Assets (Details)                   
61: R35         Summary of Significant Accounting Policies -        HTML     50K 
                Revenue Recognition (Details)                                    
22: R36         Summary of Significant Accounting Policies -        HTML     40K 
                Schedule of Segment and Geographic Reporting                     
                (Details)                                                        
46: R37         Summary of Significant Accounting Policies -        HTML     47K 
                Stock-Based Compensation (Details)                               
71: R38         Summary of Significant Accounting Policies -        HTML     33K 
                Schedule of Basic and Diluted Earnings Per Share                 
                (Details)                                                        
63: R39         Summary of Significant Accounting Policies -        HTML     31K 
                Recently Adopted Accounting Pronouncements                       
                (Details)                                                        
84: R40         Restructuring (Details)                             HTML     36K 
54: R41         Goodwill and Other Intangibles - Schedule of        HTML     32K 
                Goodwill (Details)                                               
27: R42         Goodwill and Other Intangibles - Schedule of Other  HTML     37K 
                Intangible Assets Resulting from Business                        
                Acquisitions (Details)                                           
33: R43         Goodwill and Other Intangibles - Schedule of        HTML     41K 
                Estimated Future Amortization Expense (Details)                  
83: R44         Property and Equipment - Schedule of Property and   HTML     48K 
                Equipment (Details)                                              
53: R45         Property and Equipment - Narrative (Details)        HTML     27K 
26: R46         Long-Term Debt - Schedule of Long-Term Debt         HTML     60K 
                (Details)                                                        
32: R47         Long-Term Debt - Narrative (Details)                HTML     73K 
82: R48         Leasing - Additional Information, Lessee (Details)  HTML     39K 
55: R49         Leasing - Lessee, Operating and Financing Lease     HTML     46K 
                Components and Classifications (Details)                         
58: R50         Leasing - Components of Lease Cost (Details)        HTML     46K 
67: R51         Leasing - Maturity of Lease Liabilities (Details)   HTML     77K 
38: R52         Leasing - Maturity of Lease Liabilities, before     HTML     63K 
                Adoption of New Standard (Details)                               
16: R53         Leasing - Weighted Average Remaining Lease Term     HTML     36K 
                and Discount Rate (Details)                                      
59: R54         Leasing - Cash Paid for Amount Included in the      HTML     31K 
                Measurement of Lease Liabilities (Details)                       
68: R55         Leasing - Additional Information, Lessor (Details)  HTML     35K 
39: R56         Income Taxes - Narrative (Details)                  HTML     50K 
17: R57         Income Taxes - Schedule of Income Tax Provision     HTML     55K 
                (Details)                                                        
56: R58         Income Taxes - Schedule of Deferred Tax Assets and  HTML     75K 
                Liabilities (Details)                                            
70: R59         Income Taxes - Schedule of Effective Income Tax     HTML     52K 
                Rate Reconciliation (Details)                                    
34: R60         Employee Stock Purchase Plan and Stock Plan -       HTML     78K 
                Narrative (Details)                                              
28: R61         Employee Stock Purchase Plan and Stock Plan -       HTML     30K 
                Schedule of Employee Share Purchases (Details)                   
51: R62         Employee Stock Purchase Plan and Stock Plan -       HTML     78K 
                Schedule of Stock Option Plan Activity (Details)                 
80: R63         Employee Stock Purchase Plan and Stock Plan -       HTML     50K 
                Schedule of Non-vested Stock Options (Details)                   
35: R64         Employee Stock Purchase Plan and Stock Plan -       HTML     50K 
                Schedule of Range of Exercise Price for Options                  
                Outstanding (Details)                                            
29: R65         Employee Stock Purchase Plan and Stock Plan -       HTML     50K 
                Schedule of Nonvested Restricted Stock Options                   
                (Details)                                                        
52: R66         Retirement Plans (Details)                          HTML     36K 
81: R67         Fair Value Measurements (Details)                   HTML     32K 
41: XML         IDEA XML File -- Filing Summary                      XML    147K 
44: EXCEL       IDEA Workbook of Financial Reports                  XLSX     94K 
 9: EX-101.INS  XBRL Instance -- arc-20191231                        XML   2.15M 
11: EX-101.CAL  XBRL Calculations -- arc-20191231_cal                XML    306K 
12: EX-101.DEF  XBRL Definitions -- arc-20191231_def                 XML    553K 
13: EX-101.LAB  XBRL Labels -- arc-20191231_lab                      XML   1.85M 
14: EX-101.PRE  XBRL Presentations -- arc-20191231_pre               XML   1.08M 
10: EX-101.SCH  XBRL Schema -- arc-20191231                          XSD    152K 
79: ZIP         XBRL Zipped Folder -- 0001305168-20-000004-xbrl      Zip    255K

‘EX-101.LAB’   —   XBRL Labels — arc-20191231_lab

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
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<link:label id="lab_us-gaap_DebtInstrumentTable_DDF0634489E6DC003E71C5818486BF76_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable_DDF0634489E6DC003E71C5818486BF76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Long-term Debt Instruments [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_DDF0634489E6DC003E71C5818486BF76" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Type [Axis] </link:label>
<link:label id="lab_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1" xlink:to="lab_us-gaap_LongtermDebtTypeAxis_6C34B3D14E3ECC5F9353C581848638D1" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Type [Domain] </link:label>
<link:label id="lab_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7" xlink:to="lab_us-gaap_LongtermDebtTypeDomain_7FE320E42BE38A64B2BDC581848623E7" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Line of Credit </link:label>
<link:label id="lab_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D" xlink:to="lab_us-gaap_LineOfCreditMember_8EA089112324DFDC3DE6C5818486209D" xlink:type="arc"/>
<link:label id="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597_terseLabel_en-US" xlink:label="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Various capital leases </link:label>
<link:label id="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597_label_en-US" xlink:label="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease [Member] </link:label>
<link:label id="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597_documentation_en-US" xlink:label="lab_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Finance Lease [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_FinanceLeaseMember" xlink:label="loc_arc_FinanceLeaseMember_773B432DEBA9B2997856C5818486F597" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeaseObligationsMember_E4671A67D760B5091A7EC5818486E02F_verboseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsMember_E4671A67D760B5091A7EC5818486E02F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Various capital leases </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligationsMember_E4671A67D760B5091A7EC5818486E02F_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsMember_E4671A67D760B5091A7EC5818486E02F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations [Member] </link:label>
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<link:label id="lab_us-gaap_DebtInstrumentAxis_7BDED00FD3CA1B98916DC5818486E2CC_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_7BDED00FD3CA1B98916DC5818486E2CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Axis] </link:label>
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<link:label id="lab_us-gaap_DebtInstrumentNameDomain_D5DA5456B7073464A1B1C58184864649_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_D5DA5456B7073464A1B1C58184864649" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Name [Domain] </link:label>
<link:label id="lab_us-gaap_DebtInstrumentNameDomain_D5DA5456B7073464A1B1C58184864649_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_D5DA5456B7073464A1B1C58184864649" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Name [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_D5DA5456B7073464A1B1C58184864649" xlink:type="locator"/>
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<link:label id="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172_terseLabel_en-US" xlink:label="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Term A Loan Facility </link:label>
<link:label id="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172_label_en-US" xlink:label="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Term A Loan Facility [Member] </link:label>
<link:label id="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172_documentation_en-US" xlink:label="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Term A Loan Facility [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_TermALoanFacilityMember" xlink:label="loc_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:to="lab_arc_TermALoanFacilityMember_0D7CC8D6D8CF05C11F56C5818486E172" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:label id="lab_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3" xlink:to="lab_us-gaap_CreditFacilityAxis_327A31309BE1A02B3F00C5818486ABE3" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:label id="lab_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8" xlink:to="lab_us-gaap_CreditFacilityDomain_2EAE842C037EA73AF5BBC5818486CBB8" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility </link:label>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_18841C252AC06C4DA0E8C58184867988" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Line Items] </link:label>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E" xlink:to="lab_us-gaap_DebtInstrumentLineItems_F98A56CA9B69FBA5B35CC58184860E5E" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt </link:label>
<link:label id="lab_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4_label_en-US" xlink:label="lab_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4" xlink:to="lab_us-gaap_LongTermDebt_F01C679654BFE7B516AEC58184862BF4" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C_verboseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Various capital leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiability" xlink:label="loc_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C" xlink:to="lab_us-gaap_FinanceLeaseLiability_20E778B7E4D6A3B4940DC5818486D66C" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Various capital leases </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligations" xlink:label="loc_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5" xlink:to="lab_us-gaap_CapitalLeaseObligations_7DBBEA9C4A1ADFAA091FC5818486D3E5" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD_totalLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt and capital lease obligations, including current maturities </link:label>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt and Lease Obligation, Including Current Maturities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_3D3B6445CC11C8514E85C581848648AD" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416_negatedLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less current portion </link:label>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt and Lease Obligation, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_631E8FCD4EC49F91300DC58184863416" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_B6E683B3CE262A0A266FC5818486CC3A_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_B6E683B3CE262A0A266FC5818486CC3A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt and finance leases </link:label>
<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_B6E683B3CE262A0A266FC5818486CC3A_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_B6E683B3CE262A0A266FC5818486CC3A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt and Lease Obligation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_B6E683B3CE262A0A266FC5818486CC3A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredFinanceCostsNet_B37B675FA941C823906BC5818486EB83_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_B37B675FA941C823906BC5818486EB83" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Deferred financing fees </link:label>
<link:label id="lab_us-gaap_DeferredFinanceCostsNet_B37B675FA941C823906BC5818486EB83_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_B37B675FA941C823906BC5818486EB83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Issuance Costs, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_B37B675FA941C823906BC5818486EB83" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_05DAA45E592FC5F20024C5818486C144_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_05DAA45E592FC5F20024C5818486C144" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt instrument, interest rate, effective percentage </link:label>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_05DAA45E592FC5F20024C5818486C144_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_05DAA45E592FC5F20024C5818486C144" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate, Effective Percentage </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_05DAA45E592FC5F20024C5818486C144" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongtermDebtWeightedAverageInterestRate_DB8DDC337A03492A7F01C5818486AB8C_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtWeightedAverageInterestRate_DB8DDC337A03492A7F01C5818486AB8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt, weighted average interest rate </link:label>
<link:label id="lab_us-gaap_LongtermDebtWeightedAverageInterestRate_DB8DDC337A03492A7F01C5818486AB8C_label_en-US" xlink:label="lab_us-gaap_LongtermDebtWeightedAverageInterestRate_DB8DDC337A03492A7F01C5818486AB8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Weighted Average Interest Rate, at Point in Time </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_LongtermDebtWeightedAverageInterestRate_DB8DDC337A03492A7F01C5818486AB8C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RestructuringAndRelatedActivitiesAbstract_113245D502CDCA0CA86BC58184D84CFE_label_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedActivitiesAbstract_113245D502CDCA0CA86BC58184D84CFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Restructuring and Related Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_113245D502CDCA0CA86BC58184D84CFE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_F6178B279C3E756AE1A6C581857B5F07_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain_F6178B279C3E756AE1A6C581857B5F07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Concentration Risk Type [Domain] </link:label>
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<link:label id="lab_us-gaap_CustomerConcentrationRiskMember_605E071C18C3BB855660C581857B635F_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_605E071C18C3BB855660C581857B635F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer Concentration Risk </link:label>
<link:label id="lab_us-gaap_CustomerConcentrationRiskMember_605E071C18C3BB855660C581857B635F_label_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_605E071C18C3BB855660C581857B635F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Customer Concentration Risk [Member] </link:label>
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<link:label id="lab_us-gaap_GeographicConcentrationRiskMember_1428C8CE0E65A01E9B5BC581857BF6D1_label_en-US" xlink:label="lab_us-gaap_GeographicConcentrationRiskMember_1428C8CE0E65A01E9B5BC581857BF6D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Geographic Concentration Risk [Member] </link:label>
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<link:label id="lab_us-gaap_SupplierConcentrationRiskMember_9779C98401A9FAB628F1C581857BEF3B_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplierConcentrationRiskMember_9779C98401A9FAB628F1C581857BEF3B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Supplier Concentration Risk </link:label>
<link:label id="lab_us-gaap_SupplierConcentrationRiskMember_9779C98401A9FAB628F1C581857BEF3B_label_en-US" xlink:label="lab_us-gaap_SupplierConcentrationRiskMember_9779C98401A9FAB628F1C581857BEF3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Supplier Concentration Risk [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplierConcentrationRiskMember" xlink:label="loc_us-gaap_SupplierConcentrationRiskMember_9779C98401A9FAB628F1C581857BEF3B" xlink:type="locator"/>
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<link:label id="lab_srt_StatementGeographicalAxis_A45D354C4396140DAE92C581857B8D00_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_A45D354C4396140DAE92C581857B8D00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Geographical [Axis] </link:label>
<link:label id="lab_srt_StatementGeographicalAxis_A45D354C4396140DAE92C581857B8D00_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis_A45D354C4396140DAE92C581857B8D00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Geographical [Axis] </link:label>
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<link:label id="lab_srt_SegmentGeographicalDomain_3F08427592E304081FDFC581857BFA52_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_3F08427592E304081FDFC581857BFA52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Geographical [Domain] </link:label>
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<link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_CA" xlink:label="loc_stpr_CA_A6E3659E927ADCDC2555C581857BB917" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_4741CE4827A4C6452CA7C581857B411E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_4741CE4827A4C6452CA7C581857B411E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Supplier [Axis] </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_15973B511AD2962DA318C581857B6A46" xlink:type="locator"/>
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<link:label id="lab_arc_ThreeLargestVendorsMember_D780FC6E1A9EEA4BD909C581857B84BB_terseLabel_en-US" xlink:label="lab_arc_ThreeLargestVendorsMember_D780FC6E1A9EEA4BD909C581857B84BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Three Largest Vendors </link:label>
<link:label id="lab_arc_ThreeLargestVendorsMember_D780FC6E1A9EEA4BD909C581857B84BB_label_en-US" xlink:label="lab_arc_ThreeLargestVendorsMember_D780FC6E1A9EEA4BD909C581857B84BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Three Largest Vendors [Member] </link:label>
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<link:loc xlink:href="arc-20191231.xsd#arc_ThreeLargestVendorsMember" xlink:label="loc_arc_ThreeLargestVendorsMember_D780FC6E1A9EEA4BD909C581857B84BB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LetterOfCreditMember_E5645A14F5751BF92C34CA7BF8D2D497_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_E5645A14F5751BF92C34CA7BF8D2D497" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Letter of Credit </link:label>
<link:label id="lab_us-gaap_LetterOfCreditMember_E5645A14F5751BF92C34CA7BF8D2D497_label_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_E5645A14F5751BF92C34CA7BF8D2D497" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Letter of Credit [Member] </link:label>
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<link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF_terseLabel_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> London Interbank Offered Rate (LIBOR) </link:label>
<link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> London Interbank Offered Rate (LIBOR) [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF" xlink:to="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5ED56CD6EBD3B1DE0E83CA7BF8D2CDFF" xlink:type="arc"/>
<link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656_terseLabel_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Federal Funds Effective Swap Rate </link:label>
<link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656_label_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fed Funds Effective Rate Overnight Index Swap Rate [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656" xlink:to="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B45D322DF3EEF4E5B958CA7BF8D35656" xlink:type="arc"/>
<link:label id="lab_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F_terseLabel_en-US" xlink:label="lab_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Prime Rate </link:label>
<link:label id="lab_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F_label_en-US" xlink:label="lab_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Prime Rate [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrimeRateMember" xlink:label="loc_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F" xlink:to="lab_us-gaap_PrimeRateMember_4E1A1F702125AF541F21CA7BF8D3663F" xlink:type="arc"/>
<link:label id="lab_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870_terseLabel_en-US" xlink:label="lab_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statistical Measurement [Axis] </link:label>
<link:label id="lab_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870_label_en-US" xlink:label="lab_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statistical Measurement [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870" xlink:to="lab_srt_RangeAxis_900D39288F2242E37F63CA7BF8D3C870" xlink:type="arc"/>
<link:label id="lab_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83_terseLabel_en-US" xlink:label="lab_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statistical Measurement [Domain] </link:label>
<link:label id="lab_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83_label_en-US" xlink:label="lab_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statistical Measurement [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83" xlink:to="lab_srt_RangeMember_2A7B5F2AD0CE2481D9D6CA7BF8D36C83" xlink:type="arc"/>
<link:label id="lab_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4_terseLabel_en-US" xlink:label="lab_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Minimum </link:label>
<link:label id="lab_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4_label_en-US" xlink:label="lab_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Minimum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4" xlink:to="lab_srt_MinimumMember_74DEECC25B51147B116ACA7BF8D3C2B4" xlink:type="arc"/>
<link:label id="lab_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E_terseLabel_en-US" xlink:label="lab_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Maximum </link:label>
<link:label id="lab_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E_label_en-US" xlink:label="lab_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Maximum [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E" xlink:to="lab_srt_MaximumMember_F313458B255638AB9EEACA7BF8D3162E" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Term loan, maximum borrowing capacity </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Maximum Borrowing Capacity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9F889DFDC93B3F4D5D18CA7BF8D4C66A" xlink:type="arc"/>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Repayments of outstanding term loan </link:label>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Repayments of Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebt_F798ABC3E0390E9D395ACA7BF8D44347" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Line of credit, remaining borrowing capacity </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Remaining Borrowing Capacity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8898EED5E5B665EF5643CA7BF8D49DE3" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Line of credit facility, fair value of amount outstanding </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Fair Value of Amount Outstanding </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding" xlink:label="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6" xlink:to="lab_us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_B226D87862098DBEC943CA7BF8D4FFC6" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt instrument, basis spread on variable rate </link:label>
<link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Basis Spread on Variable Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2" xlink:to="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_FD83FA6D7FCBFDB5B8FECA7BF8D5D7C2" xlink:type="arc"/>
<link:label id="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418_terseLabel_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total leverage ratio </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418_label_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Term, Total Leverage Ratio </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418_documentation_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Term, Total Leverage Ratio </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_DebtInstrumentCovenantTermTotalLeverageRatio" xlink:label="loc_arc_DebtInstrumentCovenantTermTotalLeverageRatio_98E7BE74A2C74D12E274CA7BF8D5E418" xlink:type="locator"/>
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<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99_terseLabel_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt instrument, covenant terms, fixed charged coverage ratio </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99_label_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Terms, Fixed Charged Coverage Ratio </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99_documentation_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Terms, Fixed Charged Coverage Ratio </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio" xlink:label="loc_arc_DebtInstrumentCovenantTermsFixedChargedCoverageRatio_58F28CC6538752BE67CACA7BF8D51A99" xlink:type="locator"/>
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<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0_terseLabel_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt instrument covenant terms maximum payments </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0_label_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Terms, Fixed Charge Coverage Ratio, Maximum Annual Payments </link:label>
<link:label id="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0_documentation_en-US" xlink:label="lab_arc_DebtInstrumentCovenantTermsFixedChargeCoverageRatioMaximumAnnualPayments_915DCE3D5E0E46BB9FC4CA7BF8D585C0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant Terms, Fixed Charge Coverage Ratio, Maximum Annual Payments </link:label>
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<link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_60577B31EB5FB9D57F86C58184104AB8_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_60577B31EB5FB9D57F86C58184104AB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred rent expense </link:label>
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<link:label id="lab_arc_DeferredTaxAssetsRightOfUseLiabilities_582EFCBCCF6860CADC64C5818410BF1C_terseLabel_en-US" xlink:label="lab_arc_DeferredTaxAssetsRightOfUseLiabilities_582EFCBCCF6860CADC64C5818410BF1C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Right of use operating lease liabilities </link:label>
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<link:label id="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_1399FF02A1FF680BD5CEC5818410ED19_verboseLabel_en-US" xlink:label="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_1399FF02A1FF680BD5CEC5818410ED19" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Deferred tax liabilities: </link:label>
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<link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2FB82D1ED0291507D026C58185DFAF18_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2FB82D1ED0291507D026C58185DFAF18" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Adjustments to reconcile net income to net cash provided by operating activities: </link:label>
<link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2FB82D1ED0291507D026C58185DFAF18_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2FB82D1ED0291507D026C58185DFAF18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2FB82D1ED0291507D026C58185DFAF18" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProvisionForDoubtfulAccounts_1852B52C49E0A0DCE638C58185DF127E_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForDoubtfulAccounts_1852B52C49E0A0DCE638C58185DF127E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Allowance for accounts receivable </link:label>
<link:label id="lab_us-gaap_ProvisionForDoubtfulAccounts_1852B52C49E0A0DCE638C58185DF127E_label_en-US" xlink:label="lab_us-gaap_ProvisionForDoubtfulAccounts_1852B52C49E0A0DCE638C58185DF127E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable, Credit Loss Expense (Reversal) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_1852B52C49E0A0DCE638C58185DF127E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23_terseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Depreciation </link:label>
<link:label id="lab_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23_label_en-US" xlink:label="lab_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Depreciation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23" xlink:to="lab_us-gaap_Depreciation_92D23FE69BE872DBAD61C58185DF5F23" xlink:type="arc"/>
<link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_7481BD9E1306645034E1C58185DF2D2F_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_7481BD9E1306645034E1C58185DF2D2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortization of intangible assets </link:label>
<link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_7481BD9E1306645034E1C58185DF2D2F_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_7481BD9E1306645034E1C58185DF2D2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Amortization of Intangible Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_7481BD9E1306645034E1C58185DF2D2F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AmortizationOfFinancingCosts_A87E1DEADFF28189678AC58185DF1B47_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_A87E1DEADFF28189678AC58185DF1B47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortization of deferred financing costs </link:label>
<link:label id="lab_us-gaap_AmortizationOfFinancingCosts_A87E1DEADFF28189678AC58185DF1B47_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_A87E1DEADFF28189678AC58185DF1B47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Amortization of Debt Issuance Costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_A87E1DEADFF28189678AC58185DF1B47" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensation_0D4EBE81D6BDF422F8C9C58185DF163A_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_0D4EBE81D6BDF422F8C9C58185DF163A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock-based compensation </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensation_0D4EBE81D6BDF422F8C9C58185DF163A_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_0D4EBE81D6BDF422F8C9C58185DF163A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Noncash Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_0D4EBE81D6BDF422F8C9C58185DF163A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_F2D8DE22A1DE369BD28FC58185DF1BF7_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_F2D8DE22A1DE369BD28FC58185DF1BF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred income taxes </link:label>
<link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_F2D8DE22A1DE369BD28FC58185DF1BF7_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_F2D8DE22A1DE369BD28FC58185DF1BF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Taxes and Tax Credits </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_F2D8DE22A1DE369BD28FC58185DF1BF7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Deferred tax valuation allowance </link:label>
<link:label id="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67_label_en-US" xlink:label="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67" xlink:to="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_BDC0061CFEDDFD5BA417C58185DF9E67" xlink:type="arc"/>
<link:label id="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9_terseLabel_en-US" xlink:label="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restructuring expense, non-cash portion </link:label>
<link:label id="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9_label_en-US" xlink:label="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncash Restructuring Charges </link:label>
<link:label id="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9_documentation_en-US" xlink:label="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Non cash restructuring charges. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_NoncashRestructuringCharges" xlink:label="loc_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:to="lab_arc_NoncashRestructuringCharges_F0FC39C613FD7A80CD94C58185DF83D9" xlink:type="arc"/>
<link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_D04A4E6CAFC57F83662DC58185DF4839_negatedLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_D04A4E6CAFC57F83662DC58185DF4839" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Loss on extinguishment and modification of debt </link:label>
<link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_D04A4E6CAFC57F83662DC58185DF4839_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_D04A4E6CAFC57F83662DC58185DF4839" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gain (Loss) on Extinguishment of Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_D04A4E6CAFC57F83662DC58185DF4839" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Other non-cash items, net </link:label>
<link:label id="lab_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E_label_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Noncash Income (Expense) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E" xlink:to="lab_us-gaap_OtherNoncashIncomeExpense_FE7A75586FCF1819CCF8C58185DFAE5E" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3D637BFAA933DAD5026DC58185DF25B0_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3D637BFAA933DAD5026DC58185DF25B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Changes in operating assets and liabilities: </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3D637BFAA933DAD5026DC58185DF25B0_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3D637BFAA933DAD5026DC58185DF25B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Operating Capital [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3D637BFAA933DAD5026DC58185DF25B0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69A662D3F0A1F5E15B00C58185DF2AF0_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69A662D3F0A1F5E15B00C58185DF2AF0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Accounts receivable </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69A662D3F0A1F5E15B00C58185DF2AF0_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_69A662D3F0A1F5E15B00C58185DF2AF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Accounts Receivable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_69A662D3F0A1F5E15B00C58185DF2AF0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInInventories_7617F8EA77F86B5E6724C58185DF31E0_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInventories_7617F8EA77F86B5E6724C58185DF31E0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Inventory </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInInventories_7617F8EA77F86B5E6724C58185DF31E0_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInventories_7617F8EA77F86B5E6724C58185DF31E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Inventories </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_963B27F5E390943309CFC58185DF2FB5_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_963B27F5E390943309CFC58185DF2FB5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Prepaid expenses and other assets </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_57A50786A18577FD141DC58185DF82FE_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_57A50786A18577FD141DC58185DF82FE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net cash provided by operating activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_57A50786A18577FD141DC58185DF82FE_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_57A50786A18577FD141DC58185DF82FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Operating Activities </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_55A5FF95428C347063CAC58185DFEC85_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_55A5FF95428C347063CAC58185DFEC85" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash flows from investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_55A5FF95428C347063CAC58185DFEC85_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_55A5FF95428C347063CAC58185DFEC85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities [Abstract] </link:label>
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<link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_292917366F910ADC6158C58185DF198E_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_292917366F910ADC6158C58185DF198E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Capital expenditures </link:label>
<link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_292917366F910ADC6158C58185DF198E_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_292917366F910ADC6158C58185DF198E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Acquire Property, Plant, and Equipment </link:label>
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<link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_600076A82A5BEA70B5D2C58185DFFB81_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_600076A82A5BEA70B5D2C58185DFFB81" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Other </link:label>
<link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_600076A82A5BEA70B5D2C58185DFFB81_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_600076A82A5BEA70B5D2C58185DFFB81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for (Proceeds from) Other Investing Activities </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_FDE1B3C87E8839B99C83C58185DF4C3D_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_FDE1B3C87E8839B99C83C58185DF4C3D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net cash used in investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_FDE1B3C87E8839B99C83C58185DF4C3D_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_FDE1B3C87E8839B99C83C58185DF4C3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_3DC5997F72246F54D3FBC58185DF81AB_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_3DC5997F72246F54D3FBC58185DF81AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash flows from financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_3DC5997F72246F54D3FBC58185DF81AB_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_3DC5997F72246F54D3FBC58185DF81AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities [Abstract] </link:label>
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<link:label id="lab_us-gaap_ProceedsFromStockPlans_722E9355EDF2F3F0C0EAC58185DF59E9_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockPlans_722E9355EDF2F3F0C0EAC58185DF59E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from issuance of common stock under Employee Stock Purchase Plan </link:label>
<link:label id="lab_us-gaap_ProceedsFromStockPlans_722E9355EDF2F3F0C0EAC58185DF59E9_label_en-US" xlink:label="lab_us-gaap_ProceedsFromStockPlans_722E9355EDF2F3F0C0EAC58185DF59E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Stock Plans </link:label>
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<link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B3F1B4117ED72778DADDC58185DF458D_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B3F1B4117ED72778DADDC58185DF458D" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Share repurchases </link:label>
<link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B3F1B4117ED72778DADDC58185DF458D_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B3F1B4117ED72778DADDC58185DF458D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for Repurchase of Common Stock </link:label>
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<link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_CD9483D5A3AFEA5C9432C58185DF6E5F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_CD9483D5A3AFEA5C9432C58185DF6E5F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Contingent consideration on prior acquisitions </link:label>
<link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_CD9483D5A3AFEA5C9432C58185DF6E5F_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_CD9483D5A3AFEA5C9432C58185DF6E5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_CD9483D5A3AFEA5C9432C58185DF6E5F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_612BA06F1A6EEF947E6DC58185DFCF85_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_612BA06F1A6EEF947E6DC58185DFCF85" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Payments on long-term debt agreements and capital leases </link:label>
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<link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_5675A0A2EFB6234FEA7FC58185DF011B_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_5675A0A2EFB6234FEA7FC58185DF011B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Borrowings under revolving credit facilities </link:label>
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<link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_D3C0AB5092E87BA9DF3FC58185DF05B5_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_D3C0AB5092E87BA9DF3FC58185DF05B5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Payments under revolving credit facilities </link:label>
<link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_D3C0AB5092E87BA9DF3FC58185DF05B5_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_D3C0AB5092E87BA9DF3FC58185DF05B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Repayments of Lines of Credit </link:label>
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<link:label id="lab_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA_negatedLabel_en-US" xlink:label="lab_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Payment of deferred financing costs </link:label>
<link:label id="lab_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA_label_en-US" xlink:label="lab_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments Of Deferred Financing Fees </link:label>
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<link:loc xlink:href="arc-20191231.xsd#arc_PaymentsOfDeferredFinancingFees" xlink:label="loc_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA" xlink:to="lab_arc_PaymentsOfDeferredFinancingFees_20289FC750D20F71FF51C58185DF62FA" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net cash used in financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_3D679BB3A982F4D6192FC58185DF4AD0" xlink:type="arc"/>
<link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Effect of foreign currency translation on cash balances </link:label>
<link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60_label_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60" xlink:to="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_99C0D5B9D275B96458F0C58185DF3E60" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net change in cash and cash equivalents </link:label>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_32204BF0538A0A471982C58185DFEC23" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents at beginning of period </link:label>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_5CDF5B77A96F48EA2222C58185DF690C" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1F6809AEF2A8527E53E1C58185DFDF49_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1F6809AEF2A8527E53E1C58185DFDF49" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents at end of period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1F6809AEF2A8527E53E1C58185DFDF49" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1F6809AEF2A8527E53E1C58185DFDF49" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1F6809AEF2A8527E53E1C58185DFDF49" xlink:type="arc"/>
<link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Supplemental disclosure of cash flow information: </link:label>
<link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Supplemental Cash Flow Information [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_8991615E4E58953BD39AC58185DF1F8B" xlink:type="arc"/>
<link:label id="lab_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for interest </link:label>
<link:label id="lab_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Paid, Excluding Capitalized Interest, Operating Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4" xlink:to="lab_us-gaap_InterestPaidNet_3D2742B860588CC32F6EC58185DF98E4" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income taxes paid, net </link:label>
<link:label id="lab_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Taxes Paid, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB" xlink:to="lab_us-gaap_IncomeTaxesPaidNet_1A4B7D70356D0971078FC58185DF92DB" xlink:type="arc"/>
<link:label id="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495_terseLabel_en-US" xlink:label="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncash financing activities: </link:label>
<link:label id="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495_label_en-US" xlink:label="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Non Cash Financing Activity [Abstract] </link:label>
<link:label id="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495_documentation_en-US" xlink:label="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Non cash financing activity. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_NonCashFinancingActivityAbstract" xlink:label="loc_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:to="lab_arc_NonCashFinancingActivityAbstract_13843A3107992FDCD642C58185DF9495" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finance lease obligations incurred </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease Obligation Incurred </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE" xlink:to="lab_us-gaap_CapitalLeaseObligationsIncurred_701440868F2D4BD76122C58185DF55FE" xlink:type="arc"/>
<link:label id="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73_terseLabel_en-US" xlink:label="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating lease obligations incurred </link:label>
<link:label id="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73_label_en-US" xlink:label="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease Obligations Incurred </link:label>
<link:label id="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73_documentation_en-US" xlink:label="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Operating Lease Obligations Incurred </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_OperatingLeaseObligationsIncurred" xlink:label="loc_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:to="lab_arc_OperatingLeaseObligationsIncurred_DF717BEE91C6F358E9C0C58185DFFD73" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueDisclosuresAbstract_4D599981284C4D2BBC23C58183C031DD_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_4D599981284C4D2BBC23C58183C031DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Disclosures [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_4D599981284C4D2BBC23C58183C031DD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_4D599981284C4D2BBC23C58183C031DD" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract_4D599981284C4D2BBC23C58183C031DD" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_9C869379EE417A8C2842C58183C1C516_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_9C869379EE417A8C2842C58183C1C516" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value, Assets Measured on Recurring and Nonrecurring Basis </link:label>
<link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_9C869379EE417A8C2842C58183C1C516_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_9C869379EE417A8C2842C58183C1C516" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Measurements, Nonrecurring [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_9C869379EE417A8C2842C58183C1C516" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0_terseLabel_en-US" xlink:label="lab_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total net sales </link:label>
<link:label id="lab_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0_label_en-US" xlink:label="lab_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenues </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0" xlink:to="lab_us-gaap_Revenues_0C522844B4FEE8BE04B9C581854CA1C0" xlink:type="arc"/>
<link:label id="lab_us-gaap_InventoryValuationReserves_9B6B484DBDE8BDF815B6C581854C8555_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryValuationReserves_9B6B484DBDE8BDF815B6C581854C8555" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Reserves for inventory obsolescence </link:label>
<link:label id="lab_us-gaap_InventoryValuationReserves_9B6B484DBDE8BDF815B6C581854C8555_label_en-US" xlink:label="lab_us-gaap_InventoryValuationReserves_9B6B484DBDE8BDF815B6C581854C8555" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Inventory Valuation Reserves </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryValuationReserves" xlink:label="loc_us-gaap_InventoryValuationReserves_9B6B484DBDE8BDF815B6C581854C8555" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredTaxAssetsValuationAllowance_FB0F150C01905BF7F744C581854C0AFC_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsValuationAllowance_FB0F150C01905BF7F744C581854C0AFC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Valuation allowance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_FB0F150C01905BF7F744C581854C0AFC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredFinanceCostsNet_25681F73B4A92A62AA8EC581854C766F_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_25681F73B4A92A62AA8EC581854C766F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred financing fees </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_25681F73B4A92A62AA8EC581854C766F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_25681F73B4A92A62AA8EC581854C766F" xlink:to="lab_us-gaap_DeferredFinanceCostsNet_25681F73B4A92A62AA8EC581854C766F" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated amortization </link:label>
<link:label id="lab_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C_label_en-US" xlink:label="lab_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accumulated Amortization, Debt Issuance Costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="loc_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C" xlink:to="lab_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_D0DECB8DDFC25692063BC581854C601C" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15110A0441A034AC1BEDC581854CA697_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15110A0441A034AC1BEDC581854CA697" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Cash equivalents </link:label>
<link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15110A0441A034AC1BEDC581854CA697_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15110A0441A034AC1BEDC581854CA697" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents, Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15110A0441A034AC1BEDC581854CA697" xlink:type="locator"/>
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<link:label id="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A_verboseLabel_en-US" xlink:label="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Carrying amount of notes </link:label>
<link:label id="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A_label_en-US" xlink:label="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Notes Payable Carrying Value Disclosure </link:label>
<link:label id="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A_documentation_en-US" xlink:label="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Notes payable carrying value disclosure. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_NotesPayableCarryingValueDisclosure" xlink:label="loc_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:to="lab_arc_NotesPayableCarryingValueDisclosure_E55D2B117AA84FB699CDC581854C367A" xlink:type="arc"/>
<link:label id="lab_us-gaap_NotesPayableFairValueDisclosure_4554FE73A85C8F3D15F9C581854CEE63_verboseLabel_en-US" xlink:label="lab_us-gaap_NotesPayableFairValueDisclosure_4554FE73A85C8F3D15F9C581854CEE63" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair value of notes </link:label>
<link:label id="lab_us-gaap_NotesPayableFairValueDisclosure_4554FE73A85C8F3D15F9C581854CEE63_label_en-US" xlink:label="lab_us-gaap_NotesPayableFairValueDisclosure_4554FE73A85C8F3D15F9C581854CEE63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Notes Payable, Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableFairValueDisclosure" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_4554FE73A85C8F3D15F9C581854CEE63" xlink:type="locator"/>
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<link:label id="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB_verboseLabel_en-US" xlink:label="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Deductible insurance policy </link:label>
<link:label id="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB_label_en-US" xlink:label="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Workers Compensation Deductible Per Individual </link:label>
<link:label id="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB_documentation_en-US" xlink:label="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Workers compensation deductible per individual. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_WorkersCompensationDeductiblePerIndividual" xlink:label="loc_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:to="lab_arc_WorkersCompensationDeductiblePerIndividual_05FBF2895DCD3294EBA3C581854C8AEB" xlink:type="arc"/>
<link:label id="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87_verboseLabel_en-US" xlink:label="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Self-insured for healthcare benefits </link:label>
<link:label id="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87_label_en-US" xlink:label="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Self Insurance Stop Loss Amount </link:label>
<link:label id="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87_documentation_en-US" xlink:label="lab_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Self insurance stop loss amount. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_SelfInsuranceStopLossAmount" xlink:label="loc_arc_SelfInsuranceStopLossAmount_890E5B86BA316AEB3578C581854CBB87" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1_verboseLabel_en-US" xlink:label="lab_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Advertising costs </link:label>
<link:label id="lab_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1_label_en-US" xlink:label="lab_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Advertising Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdvertisingExpense" xlink:label="loc_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1" xlink:to="lab_us-gaap_AdvertisingExpense_701AEE0A9E0FCC8107F9C581854C63A1" xlink:type="arc"/>
<link:label id="lab_us-gaap_ResearchAndDevelopmentExpense_AE135142D8718EAE517FC581854C10A8_verboseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_AE135142D8718EAE517FC581854C10A8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Research and development </link:label>
<link:label id="lab_us-gaap_ResearchAndDevelopmentExpense_AE135142D8718EAE517FC581854C10A8_label_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_AE135142D8718EAE517FC581854C10A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Research and Development Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_AE135142D8718EAE517FC581854C10A8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestTable_6BCC53FAC27370891B4AC581855CB259_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestTable_6BCC53FAC27370891B4AC581855CB259" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Table] </link:label>
<link:label id="lab_us-gaap_MinorityInterestTable_6BCC53FAC27370891B4AC581855CB259_label_en-US" xlink:label="lab_us-gaap_MinorityInterestTable_6BCC53FAC27370891B4AC581855CB259" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestTable" xlink:label="loc_us-gaap_MinorityInterestTable_6BCC53FAC27370891B4AC581855CB259" xlink:type="locator"/>
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<link:label id="lab_srt_OwnershipAxis_2FB4D0F1875E531A277FC581855C2C90_terseLabel_en-US" xlink:label="lab_srt_OwnershipAxis_2FB4D0F1875E531A277FC581855C2C90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Ownership [Axis] </link:label>
<link:label id="lab_srt_OwnershipAxis_2FB4D0F1875E531A277FC581855C2C90_label_en-US" xlink:label="lab_srt_OwnershipAxis_2FB4D0F1875E531A277FC581855C2C90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Ownership [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipAxis" xlink:label="loc_srt_OwnershipAxis_2FB4D0F1875E531A277FC581855C2C90" xlink:type="locator"/>
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<link:label id="lab_srt_OwnershipDomain_3BE264D3F4CCA25EFFB9C581855C9669_terseLabel_en-US" xlink:label="lab_srt_OwnershipDomain_3BE264D3F4CCA25EFFB9C581855C9669" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Ownership [Domain] </link:label>
<link:label id="lab_srt_OwnershipDomain_3BE264D3F4CCA25EFFB9C581855C9669_label_en-US" xlink:label="lab_srt_OwnershipDomain_3BE264D3F4CCA25EFFB9C581855C9669" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Ownership [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_3BE264D3F4CCA25EFFB9C581855C9669" xlink:type="locator"/>
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<link:label id="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8_terseLabel_en-US" xlink:label="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> UDS </link:label>
<link:label id="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8_label_en-US" xlink:label="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> UDS [Member] </link:label>
<link:label id="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8_documentation_en-US" xlink:label="lab_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> UDS [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_UDSMember" xlink:label="loc_arc_UDSMember_60723BA09A4E37A62FF0C581855CC8C8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestLineItems_A4B1A3E52D52271CB386C581855CA3AD_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems_A4B1A3E52D52271CB386C581855CA3AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Line Items] </link:label>
<link:label id="lab_us-gaap_MinorityInterestLineItems_A4B1A3E52D52271CB386C581855CA3AD_label_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems_A4B1A3E52D52271CB386C581855CA3AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestLineItems" xlink:label="loc_us-gaap_MinorityInterestLineItems_A4B1A3E52D52271CB386C581855CA3AD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_CFB610E14AE27BD8350FC581855C5EFD_verboseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_CFB610E14AE27BD8350FC581855C5EFD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interest </link:label>
<link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_CFB610E14AE27BD8350FC581855C5EFD_label_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_CFB610E14AE27BD8350FC581855C5EFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_CFB610E14AE27BD8350FC581855C5EFD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_7B33D41F5DBB9B43CE36C581855C78F2_verboseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_7B33D41F5DBB9B43CE36C581855C78F2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Common stock options excluded for anti-dilutive (in shares) </link:label>
<link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_7B33D41F5DBB9B43CE36C581855C78F2_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_7B33D41F5DBB9B43CE36C581855C78F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_7B33D41F5DBB9B43CE36C581855C78F2" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeasesAbstract_67EC40FB0C65E307AB37C581844F13FD_label_en-US" xlink:label="lab_us-gaap_LeasesAbstract_67EC40FB0C65E307AB37C581844F13FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Leases [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_67EC40FB0C65E307AB37C581844F13FD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lessee, Lease, Description [Table] </link:label>
<link:label id="lab_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277_label_en-US" xlink:label="lab_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Lease, Description [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277" xlink:to="lab_us-gaap_LesseeLeaseDescriptionTable_92B18C8659CB8A51A665C581844F2277" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Axis] </link:label>
<link:label id="lab_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407" xlink:to="lab_us-gaap_IncomeStatementLocationAxis_6E45F4BF46A4BB169E6AC581844FF407" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Domain] </link:label>
<link:label id="lab_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6" xlink:to="lab_us-gaap_IncomeStatementLocationDomain_36AC5F73FEDDB75104D1C581844F01A6" xlink:type="arc"/>
<link:label id="lab_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cost of sales </link:label>
<link:label id="lab_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B_label_en-US" xlink:label="lab_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cost of Sales [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B" xlink:to="lab_us-gaap_CostOfSalesMember_D0F5804FEF428A612709C581844F2E9B" xlink:type="arc"/>
<link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_451D4BD5E17184A3F45BC581844F41F1_terseLabel_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_451D4BD5E17184A3F45BC581844F41F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Selling, general and administrative expenses </link:label>
<link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_451D4BD5E17184A3F45BC581844F41F1_label_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_451D4BD5E17184A3F45BC581844F41F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Selling, General and Administrative Expenses [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_451D4BD5E17184A3F45BC581844F41F1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lessee, Lease, Description [Line Items] </link:label>
<link:label id="lab_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379_label_en-US" xlink:label="lab_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Lease, Description [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379" xlink:to="lab_us-gaap_LesseeLeaseDescriptionLineItems_4B5D6102E78149582A8EC581844FF379" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total operating lease cost </link:label>
<link:label id="lab_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="loc_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6" xlink:to="lab_us-gaap_OperatingLeaseCost_8E930B479D43C2B3AB74C581844F7CD6" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinanceLeaseRightOfUseAssetAmortization_5164CB1AFE85D943EFA3C581844F9B6F_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAssetAmortization_5164CB1AFE85D943EFA3C581844F9B6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortization of leased assets </link:label>
<link:label id="lab_us-gaap_FinanceLeaseRightOfUseAssetAmortization_5164CB1AFE85D943EFA3C581844F9B6F_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAssetAmortization_5164CB1AFE85D943EFA3C581844F9B6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-of-Use Asset, Amortization </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_5164CB1AFE85D943EFA3C581844F9B6F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest on lease liabilities </link:label>
<link:label id="lab_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Interest Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseInterestExpense" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128" xlink:to="lab_us-gaap_FinanceLeaseInterestExpense_3D08986868E37AC71A6AC581844F9128" xlink:type="arc"/>
<link:label id="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E_totalLabel_en-US" xlink:label="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total finance lease cost </link:label>
<link:label id="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E_label_en-US" xlink:label="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Cost </link:label>
<link:label id="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E_documentation_en-US" xlink:label="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Finance Lease, Cost </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_FinanceLeaseCost" xlink:label="loc_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:to="lab_arc_FinanceLeaseCost_AC2319A88FED1F8F45CBC581844F499E" xlink:type="arc"/>
<link:label id="lab_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE_totalLabel_en-US" xlink:label="lab_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total lease cost </link:label>
<link:label id="lab_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE_label_en-US" xlink:label="lab_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease, Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCost" xlink:label="loc_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE" xlink:to="lab_us-gaap_LeaseCost_4787A60F55CC9451AF01C581844FB4FE" xlink:type="arc"/>
<link:label id="lab_us-gaap_VariableLeaseCost_D97B768F5EF28A55B29FC581844FBCFE_terseLabel_en-US" xlink:label="lab_us-gaap_VariableLeaseCost_D97B768F5EF28A55B29FC581844FBCFE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Variable lease cost </link:label>
<link:label id="lab_us-gaap_VariableLeaseCost_D97B768F5EF28A55B29FC581844FBCFE_label_en-US" xlink:label="lab_us-gaap_VariableLeaseCost_D97B768F5EF28A55B29FC581844FBCFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Lease, Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableLeaseCost" xlink:label="loc_us-gaap_VariableLeaseCost_D97B768F5EF28A55B29FC581844FBCFE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term lease cost </link:label>
<link:label id="lab_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5_label_en-US" xlink:label="lab_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Lease, Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:label="loc_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5" xlink:to="lab_us-gaap_ShortTermLeaseCost_3C5C3B0D8FBE6FD3CFBAC581844F87F5" xlink:type="arc"/>
<link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9DF29B50AA4C4BD6D548C58183E11147_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9DF29B50AA4C4BD6D548C58183E11147" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9DF29B50AA4C4BD6D548C58183E11147" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9DF29B50AA4C4BD6D548C58183E11147" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_9DF29B50AA4C4BD6D548C58183E11147" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Shares purchased (in shares) </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Shares, Employee Stock Purchase Plans </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_181AB9ED8B60306F0D8CC58183E1FB6C" xlink:type="arc"/>
<link:label id="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0_verboseLabel_en-US" xlink:label="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Average price per share (in dollars per share) </link:label>
<link:label id="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0_label_en-US" xlink:label="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period Employee Stock Purchase Plans Average Price Per Share </link:label>
<link:label id="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0_documentation_en-US" xlink:label="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Stock issued during period employee stock purchase plans average price per share. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare" xlink:label="loc_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:to="lab_arc_StockIssuedDuringPeriodEmployeeStockPurchasePlansAveragePricePerShare_4BFBCAA23B029F021E87C58183E135F0" xlink:type="arc"/>
<link:label id="lab_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
<link:label id="lab_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B" xlink:to="lab_us-gaap_AssetsAbstract_952459703CB2F4A8D243C581845ED02B" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94_netLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US"> Right-of-use assets from operating leases </link:label>
<link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Right-of-Use Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94" xlink:to="lab_us-gaap_OperatingLeaseRightOfUseAsset_2B8F47CC8E55936E761FC581845E0A94" xlink:type="arc"/>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB_terseLabel_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment </link:label>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB_label_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-Of-Use Asset, Gross </link:label>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB_documentation_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-Of-Use Asset, Gross </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_FinanceLeaseRightOfUseAssetGross" xlink:label="loc_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:to="lab_arc_FinanceLeaseRightOfUseAssetGross_CF53F45CE86296494459C581845EEBCB" xlink:type="arc"/>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209_negatedTerseLabel_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated depreciation </link:label>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209_label_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-Of-Use Asset, Accumulated Depreciation </link:label>
<link:label id="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209_documentation_en-US" xlink:label="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-Of-Use Asset, Accumulated Depreciation </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation" xlink:label="loc_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:to="lab_arc_FinanceLeaseRightOfUseAssetAccumulatedDepreciation_400B9FCB7C8208CB5A44C581845EA209" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527_totalLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net </link:label>
<link:label id="lab_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Right-of-Use Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAsset" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527" xlink:to="lab_us-gaap_FinanceLeaseRightOfUseAsset_52C4691B937AFCE07060C581845ED527" xlink:type="arc"/>
<link:label id="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1_totalLabel_en-US" xlink:label="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total lease assets </link:label>
<link:label id="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1_label_en-US" xlink:label="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease, Right-Of-Use Asset </link:label>
<link:label id="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1_documentation_en-US" xlink:label="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Lease, Right-of-Use Asset </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_LeaseRightOfUseAsset" xlink:label="loc_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:to="lab_arc_LeaseRightOfUseAsset_992D5A23A7963366F2B9C581845E3BA1" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liabilities </link:label>
<link:label id="lab_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0" xlink:to="lab_us-gaap_LiabilitiesAbstract_65045B4257A970DCC7D2C581845E2EB0" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Current </link:label>
<link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities, Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract_F070C9DD96BD7B944A87C581845E306B" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Current portion of operating lease liabilities </link:label>
<link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Liability, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099" xlink:to="lab_us-gaap_OperatingLeaseLiabilityCurrent_43F0F665A5ABE14A23A9C581845E9099" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current portion of long-term finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E" xlink:to="lab_us-gaap_FinanceLeaseLiabilityCurrent_F6FAC837EE9235BF61DEC581845EBC9E" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term </link:label>
<link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities, Noncurrent [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA" xlink:to="lab_us-gaap_LiabilitiesNoncurrentAbstract_2E53139B209A4175BF65C581845E92CA" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Long-term portion of operating lease liabilities </link:label>
<link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Liability, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9" xlink:to="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_A6A17B96BB423EB177F3C581845ED0E9" xlink:type="arc"/>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term portion of finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D" xlink:to="lab_us-gaap_FinanceLeaseLiabilityNoncurrent_211D3B0EBA92BD12AEE5C581845E0E2D" xlink:type="arc"/>
<link:label id="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21_totalLabel_en-US" xlink:label="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total lease liabilities </link:label>
<link:label id="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21_label_en-US" xlink:label="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease, Liability </link:label>
<link:label id="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21_documentation_en-US" xlink:label="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Lease, Liability </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_LeaseLiability" xlink:label="loc_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:to="lab_arc_LeaseLiability_206BC903B7963D9AB4D8C581845E2D21" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Table] </link:label>
<link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319_label_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319" xlink:to="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_ECA78BE0894A514BA273C581853D2319" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_C734F1C6E74BD0B5FB28C581853D1143" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_2BCB6D52FB7507B4160DC581853D44EF" xlink:type="arc"/>
<link:label id="lab_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE_verboseLabel_en-US" xlink:label="lab_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Buildings </link:label>
<link:label id="lab_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE_label_en-US" xlink:label="lab_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Building [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE" xlink:to="lab_us-gaap_BuildingMember_81FE904A5EB6073AD0E8C581853DDDEE" xlink:type="arc"/>
<link:label id="lab_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139_verboseLabel_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Leasehold improvements </link:label>
<link:label id="lab_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139_label_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Leasehold Improvements [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139" xlink:to="lab_us-gaap_LeaseholdImprovementsMember_F9E96EB6DC17319EB7F6C581853D8139" xlink:type="arc"/>
<link:label id="lab_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9_verboseLabel_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Machinery and equipment </link:label>
<link:label id="lab_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9_label_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Machinery and Equipment [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9" xlink:to="lab_us-gaap_MachineryAndEquipmentMember_5A8042BA523BF0945D1FC581853D85E9" xlink:type="arc"/>
<link:label id="lab_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11_verboseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Furniture and fixtures </link:label>
<link:label id="lab_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11_label_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Furniture and Fixtures [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_66ECB00200DB377D0C9DC581853DAE11" xlink:type="arc"/>
<link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669_verboseLabel_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Software </link:label>
<link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669_label_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Computer Software, Intangible Asset [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669" xlink:to="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_47045025500E80BBED9CC581853DA669" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems_73FDE91C1AA7E1CEB1A5C581853D30E0" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Estimated useful lives </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Useful Life </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_7B7AB9B3F057AF024B3EC581853D72EE" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Estimated useful lives of other intangible assets </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Asset, Useful Life </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_CE873AAD71380E96208DC581853D2F52" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD_verboseLabel_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Capitalized software development costs </link:label>
<link:label id="lab_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD_label_en-US" xlink:label="lab_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capitalized Computer Software, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD" xlink:to="lab_us-gaap_CapitalizedComputerSoftwareNet_E4D501278699FE7A92D6C581853D7FBD" xlink:type="arc"/>
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<link:label id="lab_arc_EffectiveIncomeTaxRateReconciliationDiscreteItemforstatetaxes_B9088D3E0C3A724BAF58C5818400EA19_label_en-US" xlink:label="lab_arc_EffectiveIncomeTaxRateReconciliationDiscreteItemforstatetaxes_B9088D3E0C3A724BAF58C5818400EA19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation Discrete Item for state taxes </link:label>
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<link:label id="lab_arc_EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017GlobalIntangibleLowTaxedIncomePercent_37B61B42105F2DF5A10DC58184004853_label_en-US" xlink:label="lab_arc_EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017GlobalIntangibleLowTaxedIncomePercent_37B61B42105F2DF5A10DC58184004853" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Global Intangible Low Taxed Income, Percent </link:label>
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<link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_249505845480B84748E1C58184005932_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_249505845480B84748E1C58184005932" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Percent </link:label>
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<link:label id="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446_terseLabel_en-US" xlink:label="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average remaining lease term (years) </link:label>
<link:label id="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446_label_en-US" xlink:label="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Weighted Average Remaining Lease Term [Abstract] </link:label>
<link:label id="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446_documentation_en-US" xlink:label="lab_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Weighted Average Remaining Lease Term [Abstract] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_WeightedAverageRemainingLeaseTermAbstract" xlink:label="loc_arc_WeightedAverageRemainingLeaseTermAbstract_C0BF163FEDC9026CC1FEC581842F2446" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_F226170DC55DB074E78FC581842FD06C_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_F226170DC55DB074E78FC581842FD06C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Operating leases </link:label>
<link:label id="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_F226170DC55DB074E78FC581842FD06C_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_F226170DC55DB074E78FC581842FD06C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Weighted Average Remaining Lease Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_F226170DC55DB074E78FC581842FD06C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_4F7B5BDD77D09EA35890C581842F5A5E_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_4F7B5BDD77D09EA35890C581842F5A5E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_4F7B5BDD77D09EA35890C581842F5A5E_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_4F7B5BDD77D09EA35890C581842F5A5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Weighted Average Remaining Lease Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_4F7B5BDD77D09EA35890C581842F5A5E" xlink:type="locator"/>
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<link:label id="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C_terseLabel_en-US" xlink:label="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average discount rate </link:label>
<link:label id="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C_label_en-US" xlink:label="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease Weighted Average Discount Rate [Abstract] </link:label>
<link:label id="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C_documentation_en-US" xlink:label="lab_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Lease Weighted Average Discount Rate [Abstract] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_LeaseWeightedAverageDiscountRateAbstract" xlink:label="loc_arc_LeaseWeightedAverageDiscountRateAbstract_D06005A3A608F0565A5AC581842FBE6C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_19AB72B4A01D30CC8E25C581842F2C3B_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_19AB72B4A01D30CC8E25C581842F2C3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating leases </link:label>
<link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_19AB72B4A01D30CC8E25C581842F2C3B_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_19AB72B4A01D30CC8E25C581842F2C3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Weighted Average Discount Rate, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_19AB72B4A01D30CC8E25C581842F2C3B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_9A8986C2D0ED6C857B5EC581842F3F29_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_9A8986C2D0ED6C857B5EC581842F3F29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_9A8986C2D0ED6C857B5EC581842F3F29_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_9A8986C2D0ED6C857B5EC581842F3F29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Weighted Average Discount Rate, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_9A8986C2D0ED6C857B5EC581842F3F29" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeDisclosureAbstract_FA9C94BEA54567217D76C581842F76AF_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeDisclosureAbstract_FA9C94BEA54567217D76C581842F76AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for amounts included in the measurement of lease liabilities </link:label>
<link:label id="lab_us-gaap_LesseeDisclosureAbstract_FA9C94BEA54567217D76C581842F76AF_label_en-US" xlink:label="lab_us-gaap_LesseeDisclosureAbstract_FA9C94BEA54567217D76C581842F76AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee Disclosure [Abstract] </link:label>
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<link:label id="lab_us-gaap_OperatingLeasePayments_C85D83F4FCCDEA595687C581842F3837_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasePayments_C85D83F4FCCDEA595687C581842F3837" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating cash flows from operating leases </link:label>
<link:label id="lab_us-gaap_OperatingLeasePayments_C85D83F4FCCDEA595687C581842F3837_label_en-US" xlink:label="lab_us-gaap_OperatingLeasePayments_C85D83F4FCCDEA595687C581842F3837" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Payments </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseInterestPaymentOnLiability_6FAA3C97D0E9BB020505C581842F23BA_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseInterestPaymentOnLiability_6FAA3C97D0E9BB020505C581842F23BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating cash flows from finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseInterestPaymentOnLiability_6FAA3C97D0E9BB020505C581842F23BA_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseInterestPaymentOnLiability_6FAA3C97D0E9BB020505C581842F23BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Interest Payment on Liability </link:label>
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<link:label id="lab_us-gaap_FinanceLeasePrincipalPayments_715C2EE6BB195ADB59BCC581842F4D32_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeasePrincipalPayments_715C2EE6BB195ADB59BCC581842F4D32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Financing cash flows from finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeasePrincipalPayments_715C2EE6BB195ADB59BCC581842F4D32_label_en-US" xlink:label="lab_us-gaap_FinanceLeasePrincipalPayments_715C2EE6BB195ADB59BCC581842F4D32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Principal Payments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeasePrincipalPayments" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_715C2EE6BB195ADB59BCC581842F4D32" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leasing </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Leases [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeasesTextBlock" xlink:label="loc_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B" xlink:to="lab_us-gaap_LesseeOperatingLeasesTextBlock_108C098E202D0F83D802C581846E082B" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leasing </link:label>
<link:label id="lab_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessor, Operating Leases [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesOfLessorDisclosureTextBlock" xlink:label="loc_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D" xlink:to="lab_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_1195D2E3AE5F93DBB68BC581846E3A5D" xlink:type="arc"/>
<link:label id="lab_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leasing </link:label>
<link:label id="lab_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA_label_en-US" xlink:label="lab_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Finance Leases [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeFinanceLeasesTextBlock" xlink:label="loc_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA" xlink:to="lab_us-gaap_LesseeFinanceLeasesTextBlock_72CABEEAF02809797BCFC581846EC3CA" xlink:type="arc"/>
<link:label id="lab_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB_terseLabel_en-US" xlink:label="lab_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leasing </link:label>
<link:label id="lab_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB_label_en-US" xlink:label="lab_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessor, Direct Financing Leases [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorDirectFinancingLeasesTextBlock" xlink:label="loc_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB" xlink:to="lab_us-gaap_LessorDirectFinancingLeasesTextBlock_BCBEA73AC9865B2335DCC581846E9BBB" xlink:type="arc"/>
<link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_F1C843340D56926AB5D5C58186714E0D_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_F1C843340D56926AB5D5C58186714E0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Financial Position [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_F1C843340D56926AB5D5C58186714E0D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F1C843340D56926AB5D5C58186714E0D" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract_F1C843340D56926AB5D5C58186714E0D" xlink:type="arc"/>
<link:label id="lab_us-gaap_AssetsAbstract_AC44898BE7D6F060091EC5818671E1FC_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_AC44898BE7D6F060091EC5818671E1FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_AC44898BE7D6F060091EC5818671E1FC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_AC44898BE7D6F060091EC5818671E1FC" xlink:to="lab_us-gaap_AssetsAbstract_AC44898BE7D6F060091EC5818671E1FC" xlink:type="arc"/>
<link:label id="lab_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current assets: </link:label>
<link:label id="lab_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets, Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD" xlink:to="lab_us-gaap_AssetsCurrentAbstract_87327621F7E58740C9A7C581867289AD" xlink:type="arc"/>
<link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash and cash equivalents </link:label>
<link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents, at Carrying Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_D1B6D33DCE456DC2D06CC581867240BC" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Accounts receivable, net of allowances for accounts receivable of $2,099 and $2,016 </link:label>
<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable, after Allowance for Credit Loss, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A" xlink:to="lab_us-gaap_AccountsReceivableNetCurrent_B83177418183D5EABC39C5818672FE1A" xlink:type="arc"/>
<link:label id="lab_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Inventories, net </link:label>
<link:label id="lab_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918_label_en-US" xlink:label="lab_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Inventory, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918" xlink:to="lab_us-gaap_InventoryNet_C33BA2567C4C299A7077C5818672E918" xlink:type="arc"/>
<link:label id="lab_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Prepaid expenses </link:label>
<link:label id="lab_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Prepaid Expense, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD" xlink:to="lab_us-gaap_PrepaidExpenseCurrent_5616AE7D9AFAE32551FFC58186737BDD" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other current assets </link:label>
<link:label id="lab_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF_label_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Assets, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF" xlink:to="lab_us-gaap_OtherAssetsCurrent_C303D9F4293E19B68C52C581867398AF" xlink:type="arc"/>
<link:label id="lab_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total current assets </link:label>
<link:label id="lab_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0" xlink:to="lab_us-gaap_AssetsCurrent_4FAEBCFC97E38AA1D7E9C5818673FBE0" xlink:type="arc"/>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96_terseLabel_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net of accumulated depreciation of $210,849 and $199,480 </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96_label_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, After Accumulated Depreciation And Amortization </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96_documentation_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, After Accumulated Depreciation And Amortization </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:label="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:to="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_3D41EF78AC2061DD089CC5818673BA96" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_E6806D4EB4327B2E3C8AC58186736DA4_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_E6806D4EB4327B2E3C8AC58186736DA4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net of accumulated depreciation of $210,849 and $199,480 </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_E6806D4EB4327B2E3C8AC58186736DA4_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_E6806D4EB4327B2E3C8AC58186736DA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_E6806D4EB4327B2E3C8AC58186736DA4" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_B00FA2304D27165451D9C58186732EAB_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_B00FA2304D27165451D9C58186732EAB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Right-of-use assets from operating leases </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_B00FA2304D27165451D9C58186732EAB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
<link:label id="lab_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B_label_en-US" xlink:label="lab_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B" xlink:to="lab_us-gaap_Goodwill_FD712ED0E5EB0BD6DB29C58186748D4B" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C8BB6E960F9C63658FE1C58186741026_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C8BB6E960F9C63658FE1C58186741026" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other intangible assets, net </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C8BB6E960F9C63658FE1C58186741026_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C8BB6E960F9C63658FE1C58186741026" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_C8BB6E960F9C63658FE1C58186741026" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_43E1B8D2C216DBEF7415C5818674516A_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_43E1B8D2C216DBEF7415C5818674516A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred income taxes </link:label>
<link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_43E1B8D2C216DBEF7415C5818674516A_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_43E1B8D2C216DBEF7415C5818674516A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Tax Assets, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_43E1B8D2C216DBEF7415C5818674516A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other assets </link:label>
<link:label id="lab_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Assets, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747" xlink:to="lab_us-gaap_OtherAssetsNoncurrent_BF77D29D1098E45F0F49C58186746747" xlink:type="arc"/>
<link:label id="lab_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total assets </link:label>
<link:label id="lab_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF_label_en-US" xlink:label="lab_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF" xlink:to="lab_us-gaap_Assets_71BBCCD66A9C3BC9A2E7C5818674D9DF" xlink:type="arc"/>
<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_43F0E794A766E25305A8C58186740743_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_43F0E794A766E25305A8C58186740743" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liabilities and Equity </link:label>
<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_43F0E794A766E25305A8C58186740743_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_43F0E794A766E25305A8C58186740743" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities and Equity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_43F0E794A766E25305A8C58186740743" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_763F389DCEBD9147C930C5818675C791_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_763F389DCEBD9147C930C5818675C791" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current liabilities: </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_763F389DCEBD9147C930C5818675C791" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountsPayableCurrent_2CA63A1AD9F9AFB30A5DC58186750B98_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_2CA63A1AD9F9AFB30A5DC58186750B98" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts payable </link:label>
<link:label id="lab_us-gaap_AccountsPayableCurrent_2CA63A1AD9F9AFB30A5DC58186750B98_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_2CA63A1AD9F9AFB30A5DC58186750B98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Payable, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_2CA63A1AD9F9AFB30A5DC58186750B98" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_793A4641F9A3BABFC031C58186756505_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_793A4641F9A3BABFC031C58186756505" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued payroll and payroll-related expenses </link:label>
<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_793A4641F9A3BABFC031C58186756505_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_793A4641F9A3BABFC031C58186756505" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Employee-related Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_793A4641F9A3BABFC031C58186756505" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued expenses </link:label>
<link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0" xlink:to="lab_us-gaap_AccruedLiabilitiesCurrent_A894656665C96CBBF392C58186759EB0" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_91B956C8F45DA684DEEEC5818676C501_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_91B956C8F45DA684DEEEC5818676C501" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current operating lease liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_91B956C8F45DA684DEEEC5818676C501" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_BAF82CDB0CD2A036AF48C58186769FDE_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_BAF82CDB0CD2A036AF48C58186769FDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current portion of long-term debt and finance leases </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_BAF82CDB0CD2A036AF48C58186769FDE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilitiesCurrent_E11818830A8D30E6DB9FC581867687D0_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_E11818830A8D30E6DB9FC581867687D0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total current liabilities </link:label>
<link:label id="lab_us-gaap_LiabilitiesCurrent_E11818830A8D30E6DB9FC581867687D0_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_E11818830A8D30E6DB9FC581867687D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_E11818830A8D30E6DB9FC581867687D0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_BB486D47FF4671E38DD1C5818676A063_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_BB486D47FF4671E38DD1C5818676A063" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term operating lease liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_BB486D47FF4671E38DD1C5818676A063" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_EB06604E4E4152E5B785C5818676557E_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_EB06604E4E4152E5B785C5818676557E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other long-term liabilities </link:label>
<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_EB06604E4E4152E5B785C5818676557E_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_EB06604E4E4152E5B785C5818676557E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Liabilities, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_EB06604E4E4152E5B785C5818676557E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Liabilities_566386D545BD61A57A2BC58186762AB3_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_566386D545BD61A57A2BC58186762AB3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total liabilities </link:label>
<link:label id="lab_us-gaap_Liabilities_566386D545BD61A57A2BC58186762AB3_label_en-US" xlink:label="lab_us-gaap_Liabilities_566386D545BD61A57A2BC58186762AB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_566386D545BD61A57A2BC58186762AB3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CommitmentsAndContingencies_632412C7F6B4059215DAC5818677055E_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_632412C7F6B4059215DAC5818677055E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Commitments and contingencies (Note 7) </link:label>
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<link:label id="lab_us-gaap_PreferredStockValue_F2FB3595722F54FC75C3C5818677A5D8_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_F2FB3595722F54FC75C3C5818677A5D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Preferred stock, $0.001 par value, 25,000 shares authorized; 0 shares issued and outstanding </link:label>
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<link:label id="lab_us-gaap_CommonStockValue_79E817FC9EE5F6599EC7C5818677C5B7_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_79E817FC9EE5F6599EC7C5818677C5B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Common stock, $0.001 par value, 150,000 shares authorized; 49,189 and 48,492 shares issued and 45,228 and 45,818 shares outstanding </link:label>
<link:label id="lab_us-gaap_CommonStockValue_79E817FC9EE5F6599EC7C5818677C5B7_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_79E817FC9EE5F6599EC7C5818677C5B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Common Stock, Value, Issued </link:label>
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<link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_8258A90E20687B90FAFCC581867852E2_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_8258A90E20687B90FAFCC581867852E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Additional paid-in capital </link:label>
<link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_8258A90E20687B90FAFCC581867852E2_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_8258A90E20687B90FAFCC581867852E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Additional Paid in Capital, Common Stock </link:label>
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<link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_187C2EC6B0720D78C89FC5818678B05E_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_187C2EC6B0720D78C89FC5818678B05E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Retained Earnings (Accumulated Deficit) </link:label>
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<link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3621739BEC889DFC5F96C5818678C461_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3621739BEC889DFC5F96C5818678C461" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accumulated Other Comprehensive Income (Loss), Net of Tax </link:label>
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<link:label id="lab_us-gaap_StockholdersEquityBeforeTreasuryStock_588C4FFA1604476BE7CBC5818678530A_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityBeforeTreasuryStock_588C4FFA1604476BE7CBC5818678530A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total stockholders equity before adjustment of treasury stock </link:label>
<link:label id="lab_us-gaap_StockholdersEquityBeforeTreasuryStock_588C4FFA1604476BE7CBC5818678530A_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityBeforeTreasuryStock_588C4FFA1604476BE7CBC5818678530A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity before Treasury Stock </link:label>
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<link:label id="lab_us-gaap_TreasuryStockValue_03E403D80B95A2AD0E2BC58186785206_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_03E403D80B95A2AD0E2BC58186785206" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less cost of common stock in treasury, 3,960 and 2,674 shares </link:label>
<link:label id="lab_us-gaap_TreasuryStockValue_03E403D80B95A2AD0E2BC58186785206_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_03E403D80B95A2AD0E2BC58186785206" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Treasury Stock, Value </link:label>
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<link:label id="lab_us-gaap_StockholdersEquity_2A330036D50596B04EADC58186781A13_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_2A330036D50596B04EADC58186781A13" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total ARC Document Solutions, Inc. stockholders’ equity </link:label>
<link:label id="lab_us-gaap_StockholdersEquity_2A330036D50596B04EADC58186781A13_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_2A330036D50596B04EADC58186781A13" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Parent </link:label>
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<link:label id="lab_us-gaap_MinorityInterest_0020B1CDC1C05601D6D6C5818679003B_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest_0020B1CDC1C05601D6D6C5818679003B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interest </link:label>
<link:label id="lab_us-gaap_MinorityInterest_0020B1CDC1C05601D6D6C5818679003B_label_en-US" xlink:label="lab_us-gaap_MinorityInterest_0020B1CDC1C05601D6D6C5818679003B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Noncontrolling Interest </link:label>
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<link:label id="lab_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Product and Service [Axis] </link:label>
<link:label id="lab_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Product and Service [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37" xlink:to="lab_srt_ProductOrServiceAxis_C5E9DDCBB4A7575E66FEC5818633CD37" xlink:type="arc"/>
<link:label id="lab_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Product and Service [Domain] </link:label>
<link:label id="lab_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Product and Service [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776" xlink:to="lab_srt_ProductsAndServicesDomain_65835D9961FAC7D848EBC58186330776" xlink:type="arc"/>
<link:label id="lab_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4_terseLabel_en-US" xlink:label="lab_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Service sales </link:label>
<link:label id="lab_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4_label_en-US" xlink:label="lab_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Service [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ServiceMember" xlink:label="loc_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4" xlink:to="lab_us-gaap_ServiceMember_FF9F6B919018BCB62D6EC581863385E4" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2_terseLabel_en-US" xlink:label="lab_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equipment and supplies sales </link:label>
<link:label id="lab_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2_label_en-US" xlink:label="lab_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Product [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2" xlink:to="lab_us-gaap_ProductMember_57F2D03D44B38AABCC19C581863368B2" xlink:type="arc"/>
<link:label id="lab_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:label id="lab_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8" xlink:to="lab_us-gaap_StatementLineItems_2BF905C1725D5FCF8554C5818634CAB8" xlink:type="arc"/>
<link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_45FECFF2975CD1B98AC9C5818634C7E9_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_45FECFF2975CD1B98AC9C5818634C7E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cost of sales </link:label>
<link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_45FECFF2975CD1B98AC9C5818634C7E9_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_45FECFF2975CD1B98AC9C5818634C7E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cost of Goods and Services Sold </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_45FECFF2975CD1B98AC9C5818634C7E9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84_totalLabel_en-US" xlink:label="lab_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Gross profit </link:label>
<link:label id="lab_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84_label_en-US" xlink:label="lab_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gross Profit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84" xlink:to="lab_us-gaap_GrossProfit_5F543C0FCE8838970565C5818634FC84" xlink:type="arc"/>
<link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73_terseLabel_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Selling, general and administrative expenses </link:label>
<link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73_label_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Selling, General and Administrative Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73" xlink:to="lab_us-gaap_SellingGeneralAndAdministrativeExpense_DDDFCED353D903597C4EC5818634AD73" xlink:type="arc"/>
<link:label id="lab_us-gaap_RestructuringCharges_1B61DDB6085F9E659542C5818635BC05_terseLabel_en-US" xlink:label="lab_us-gaap_RestructuringCharges_1B61DDB6085F9E659542C5818635BC05" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restructuring expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_1B61DDB6085F9E659542C5818635BC05" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringCharges_1B61DDB6085F9E659542C5818635BC05" xlink:to="lab_us-gaap_RestructuringCharges_1B61DDB6085F9E659542C5818635BC05" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingIncomeLoss_30402868B9635EA40CF0C58186354420_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_30402868B9635EA40CF0C58186354420" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Income from operations </link:label>
<link:label id="lab_us-gaap_OperatingIncomeLoss_30402868B9635EA40CF0C58186354420_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_30402868B9635EA40CF0C58186354420" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Income (Loss) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_30402868B9635EA40CF0C58186354420" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NonoperatingIncomeExpense_8E8D4E2ECB6134C11EDFC5818635F620_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_8E8D4E2ECB6134C11EDFC5818635F620" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Other income, net </link:label>
<link:label id="lab_us-gaap_NonoperatingIncomeExpense_8E8D4E2ECB6134C11EDFC5818635F620_label_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_8E8D4E2ECB6134C11EDFC5818635F620" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Nonoperating Income (Expense) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_8E8D4E2ECB6134C11EDFC5818635F620" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_009769618E39370DE263C581863572F5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_009769618E39370DE263C581863572F5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Loss on extinguishment and modification of debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_009769618E39370DE263C581863572F5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_InterestExpense_8B7C66D9B2A2F81C43CBC58186355711_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense_8B7C66D9B2A2F81C43CBC58186355711" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest expense, net </link:label>
<link:label id="lab_us-gaap_InterestExpense_8B7C66D9B2A2F81C43CBC58186355711_label_en-US" xlink:label="lab_us-gaap_InterestExpense_8B7C66D9B2A2F81C43CBC58186355711" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_8B7C66D9B2A2F81C43CBC58186355711" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1DE1195EB66F2588D9C4C5818635F807_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1DE1195EB66F2588D9C4C5818635F807" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Income before income tax provision </link:label>
<link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1DE1195EB66F2588D9C4C5818635F807_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1DE1195EB66F2588D9C4C5818635F807" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_91DC2DB04A353137B16DC58186366DC8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_91DC2DB04A353137B16DC58186366DC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax provision </link:label>
<link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_91DC2DB04A353137B16DC58186366DC8_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_91DC2DB04A353137B16DC58186366DC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Expense (Benefit) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_91DC2DB04A353137B16DC58186366DC8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProfitLoss_B6B2494723DCB0820F0BC581863621E6_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_B6B2494723DCB0820F0BC581863621E6" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net income </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_B6B2494723DCB0820F0BC581863621E6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1E2663F935DABB08C329C581863630BC_negatedLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_1E2663F935DABB08C329C581863630BC" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Loss attributable to noncontrolling interest </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_144E376C9CB90519A828C581843FF55C_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_144E376C9CB90519A828C581843FF55C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_2574EFC09BE14F4F8A02C581843FCA1A_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_2574EFC09BE14F4F8A02C581843FCA1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due Year Two </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_2574EFC09BE14F4F8A02C581843FCA1A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2A18B7672DDE7C6973CEC581843F735C_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2A18B7672DDE7C6973CEC581843F735C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2A18B7672DDE7C6973CEC581843F735C_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2A18B7672DDE7C6973CEC581843F735C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due Year Three </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2A18B7672DDE7C6973CEC581843F735C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_96BA720D21235A29DA10C581843F5B81_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_96BA720D21235A29DA10C581843F5B81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_96BA720D21235A29DA10C581843F5B81_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_96BA720D21235A29DA10C581843F5B81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due Year Four </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_779A900E6D79FFA8B878C581843F3F3F_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_779A900E6D79FFA8B878C581843F3F3F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2024 </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_779A900E6D79FFA8B878C581843F3F3F_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_779A900E6D79FFA8B878C581843F3F3F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due Year Five </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_1326B0C6E3268646910DC581843FDCC5_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_1326B0C6E3268646910DC581843FDCC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3D003399CE2700C1E7F9C581843F5D31_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3D003399CE2700C1E7F9C581843F5D31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Payments, Due </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2A5FBCA1D8C49C231E87C581843FB14B_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2A5FBCA1D8C49C231E87C581843FB14B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less amount representing interest </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2A5FBCA1D8C49C231E87C581843FB14B_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2A5FBCA1D8C49C231E87C581843FB14B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Undiscounted Excess Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2A5FBCA1D8C49C231E87C581843FB14B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeaseLiability_4051C7B1BDBD1E05E706C581843F99D1_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_4051C7B1BDBD1E05E706C581843F99D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Present value of lease liability </link:label>
<link:label id="lab_us-gaap_OperatingLeaseLiability_4051C7B1BDBD1E05E706C581843F99D1_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_4051C7B1BDBD1E05E706C581843F99D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Liability </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_4051C7B1BDBD1E05E706C581843F99D1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_A6E3519184067C757DF7C581843FB6F3_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_A6E3519184067C757DF7C581843FB6F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finance leases </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_A6E3519184067C757DF7C581843FB6F3_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_A6E3519184067C757DF7C581843FB6F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Payment, Due [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract" xlink:label="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_A6E3519184067C757DF7C581843FB6F3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_CE9AD5E81418FF3A228DC581843F7B25_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_CE9AD5E81418FF3A228DC581843F7B25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_A615251D5460472F81DAC581843FC172_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_A615251D5460472F81DAC581843FC172" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_A615251D5460472F81DAC581843FC172_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_A615251D5460472F81DAC581843FC172" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Payments, Due Year Two </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_2282875DF3624E593A88C581843F77F0_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_2282875DF3624E593A88C581843F77F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_2282875DF3624E593A88C581843F77F0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_0BC6078D228EA0C577EEC581843F4705_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_0BC6078D228EA0C577EEC581843F4705" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_34A60AF6E1C8A511D78EC581843F15B9_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_34A60AF6E1C8A511D78EC581843F15B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityPaymentsDue_9A35C2F5829D832F4A9EC581843F3862_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDue_9A35C2F5829D832F4A9EC581843F3862" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Payment, Due </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_924C24F2DD2F4C9D24F5C581843FD3DC_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_924C24F2DD2F4C9D24F5C581843FD3DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less amount representing interest </link:label>
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<link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_FE66D307806AA09973BEC581843F0307_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_FE66D307806AA09973BEC581843F0307" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party [Axis] </link:label>
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<link:label id="lab_us-gaap_RelatedPartyDomain_BDB89512B0FAF65C56E5C581844FE48F_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_BDB89512B0FAF65C56E5C581844FE48F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party [Domain] </link:label>
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<link:label id="lab_srt_AffiliatedEntityMember_8D73B671F43D59ACDF30C581844FD5C3_terseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember_8D73B671F43D59ACDF30C581844FD5C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Related Party </link:label>
<link:label id="lab_srt_AffiliatedEntityMember_8D73B671F43D59ACDF30C581844FD5C3_label_en-US" xlink:label="lab_srt_AffiliatedEntityMember_8D73B671F43D59ACDF30C581844FD5C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Affiliated Entity [Member] </link:label>
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<link:label id="lab_us-gaap_LesseeLeaseDescriptionLineItems_BC1C90344ABDDF30DB2CC581844F9906_verboseLabel_en-US" xlink:label="lab_us-gaap_LesseeLeaseDescriptionLineItems_BC1C90344ABDDF30DB2CC581844F9906" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Annual Rental Payments </link:label>
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<link:label id="lab_us-gaap_OperatingLeaseExpense_276394D963701DCF9341C581844F57FB_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseExpense_276394D963701DCF9341C581844F57FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Rental expense </link:label>
<link:label id="lab_us-gaap_OperatingLeaseExpense_276394D963701DCF9341C581844F57FB_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseExpense_276394D963701DCF9341C581844F57FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Lease, Expense </link:label>
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<link:label id="lab_us-gaap_LeaseAndRentalExpense_36598AB922A104589E93C581844FD7E1_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_36598AB922A104589E93C581844FD7E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Rental expense </link:label>
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<link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_7D3FFBB1D1BAB313F4EEC58184102B7B_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_7D3FFBB1D1BAB313F4EEC58184102B7B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Income tax provision </link:label>
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<link:label id="lab_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_A00EE636AB0D559D9DE3C58185A157C5_label_en-US" xlink:label="lab_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_A00EE636AB0D559D9DE3C58185A157C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_A00EE636AB0D559D9DE3C58185A157C5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_A00EE636AB0D559D9DE3C58185A157C5" xlink:to="lab_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_A00EE636AB0D559D9DE3C58185A157C5" xlink:type="arc"/>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E_verboseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill and Other Intangible Assets </link:label>
<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_179D962FE0E53EAF492FC58185A10A0E" xlink:type="arc"/>
<link:label id="lab_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Deferred Financing Costs </link:label>
<link:label id="lab_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C_label_en-US" xlink:label="lab_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Charges, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredChargesPolicyTextBlock" xlink:label="loc_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C" xlink:to="lab_us-gaap_DeferredChargesPolicyTextBlock_48F06B8733A811DF946EC58185A13D0C" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair Values of Financial Instruments </link:label>
<link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360_label_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value of Financial Instruments, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360" xlink:to="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_13BED82B79972F2B6EFBC58185A12360" xlink:type="arc"/>
<link:label id="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506_verboseLabel_en-US" xlink:label="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Insurance Liability </link:label>
<link:label id="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506_label_en-US" xlink:label="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Insurance Liability Policy [Policy Text Block] </link:label>
<link:label id="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506_documentation_en-US" xlink:label="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Disclosure of accounting policy for insurance liabilities. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_InsuranceLiabilityPolicyPolicyTextBlock" xlink:label="loc_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:to="lab_arc_InsuranceLiabilityPolicyPolicyTextBlock_233D23E01FB6C96887DDC58185A1A506" xlink:type="arc"/>
<link:label id="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Commitments and Contingencies </link:label>
<link:label id="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Commitments and Contingencies, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesPolicyTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594" xlink:to="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_9C6D5C9601281F913CE6C58185A19594" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revenue Recognition </link:label>
<link:label id="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue from Contract with Customer [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerPolicyTextBlock" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_6DE88B43273CC0A7532DC58185A13773" xlink:type="arc"/>
<link:label id="lab_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD_verboseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Comprehensive Income (Loss) </link:label>
<link:label id="lab_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Comprehensive Income, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:label="loc_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD" xlink:to="lab_us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_156D1E6039CBCE9DD3C5C58185A1F8DD" xlink:type="arc"/>
<link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955_verboseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Segment and Geographic Reporting </link:label>
<link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955_label_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955" xlink:to="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_2910DFB80A1B22AE5E45C58185A1A955" xlink:type="arc"/>
<link:label id="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731_verboseLabel_en-US" xlink:label="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Advertising and Shipping and Handling Costs </link:label>
<link:label id="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731_label_en-US" xlink:label="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Advertising And Shipping And Handling Costs [Policy Text Block] </link:label>
<link:label id="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731_documentation_en-US" xlink:label="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Advertising and shipping and handling costs. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock" xlink:label="loc_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:to="lab_arc_AdvertisingAndShippingAndHandlingCostsPolicyTextBlock_1314EFB41840D166FD61C58185A14731" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Stock-Based Compensation </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7" xlink:to="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_B89C6209ACA987888CA0C58185A10FC7" xlink:type="arc"/>
<link:label id="lab_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE_verboseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Research and Development Expenses </link:label>
<link:label id="lab_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE_label_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Research and Development Expense, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE" xlink:to="lab_us-gaap_ResearchAndDevelopmentExpensePolicy_75C52D6EB7C47973DECBC58185A166DE" xlink:type="arc"/>
<link:label id="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60_verboseLabel_en-US" xlink:label="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest </link:label>
<link:label id="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60_label_en-US" xlink:label="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest [Policy Text Block] </link:label>
<link:label id="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60_documentation_en-US" xlink:label="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Noncontrolling interest. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_NoncontrollingInterestPolicyTextBlock" xlink:label="loc_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:to="lab_arc_NoncontrollingInterestPolicyTextBlock_89A9DC88229AC8108AAAC58185A13D60" xlink:type="arc"/>
<link:label id="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA_verboseLabel_en-US" xlink:label="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Sales Taxes </link:label>
<link:label id="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA_label_en-US" xlink:label="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Sales Taxes [Policy Text Block] </link:label>
<link:label id="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA_documentation_en-US" xlink:label="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Sales taxes. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_SalesTaxesPolicyTextBlock" xlink:label="loc_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:to="lab_arc_SalesTaxesPolicyTextBlock_9AC3F28A259E12F12C25C58185A1A4BA" xlink:type="arc"/>
<link:label id="lab_us-gaap_EarningsPerSharePolicyTextBlock_65956D3636E13ECB0A53C58185A13849_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerSharePolicyTextBlock_65956D3636E13ECB0A53C58185A13849" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Earnings Per Share </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_1E4315BC22B9EAC5C081C58183D1E4A5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_1E4315BC22B9EAC5C081C58183D1E4A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_EDCD8AC586F1EACCD578C58183D10363_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_EDCD8AC586F1EACCD578C58183D10363" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Forfeited/canceled (in dollars per share) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_A491DCD28E005F109A07C58183B9F05C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillFairValueDisclosure_297451248A22C1CDE452C58183BD0172_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillFairValueDisclosure_297451248A22C1CDE452C58183BD0172" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
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<link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A37DE9345AA98A55743AC58186059351_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A37DE9345AA98A55743AC58186059351" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Beginning Balance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A37DE9345AA98A55743AC58186059351" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A37DE9345AA98A55743AC58186059351" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A37DE9345AA98A55743AC58186059351" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock-based compensation (in shares) </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2DC1DB71AE03D8E01406C5818605B90B" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock-based compensation </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_2FDA653FDBD025BF130BC5818605BA26" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7DCFA044D896AA101B31C5818605D3EB_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7DCFA044D896AA101B31C5818605D3EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Issuance of common stock under Employee Stock Purchase Plan (in shares) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7DCFA044D896AA101B31C5818605D3EB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7DCFA044D896AA101B31C5818605D3EB" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_7DCFA044D896AA101B31C5818605D3EB" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Issuance of common stock under Employee Stock Purchase Plan </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Value, Employee Stock Purchase Plan </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_AE58E82404E200DF33F1C58186050937" xlink:type="arc"/>
<link:label id="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Treasury shares </link:label>
<link:label id="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Treasury Stock, Value, Acquired, Cost Method </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669" xlink:to="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_A6865F94F4BF89D94A73C58186058669" xlink:type="arc"/>
<link:label id="lab_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Common stock cash dividends </link:label>
<link:label id="lab_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Dividends, Common Stock, Cash </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654" xlink:to="lab_us-gaap_DividendsCommonStockCash_1548D50AA923BFE58B77C5818605E654" xlink:type="arc"/>
<link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ADD5AA5AE956E51FC829C581860596F6_terseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ADD5AA5AE956E51FC829C581860596F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Comprehensive income </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ADD5AA5AE956E51FC829C581860596F6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ADD5AA5AE956E51FC829C581860596F6" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ADD5AA5AE956E51FC829C581860596F6" xlink:type="arc"/>
<link:label id="lab_us-gaap_CommonStockSharesIssued_137BED72FA0A0332F30DC58186057A17_periodEndLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_137BED72FA0A0332F30DC58186057A17" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Ending Balance, shares (in shares) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_137BED72FA0A0332F30DC58186057A17" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued_137BED72FA0A0332F30DC58186057A17" xlink:to="lab_us-gaap_CommonStockSharesIssued_137BED72FA0A0332F30DC58186057A17" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2A4CEE516A23A9A8E6A4C581860538E8_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2A4CEE516A23A9A8E6A4C581860538E8" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2A4CEE516A23A9A8E6A4C581860538E8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2A4CEE516A23A9A8E6A4C581860538E8" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2A4CEE516A23A9A8E6A4C581860538E8" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercise Price Range [Axis] </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Exercise Price Range [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_670C4E4DF94416523320C58183D1582A" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercise Price Range [Domain] </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Exercise Price Range [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_694999052E49C8DBEF41C58183D16CEB" xlink:type="arc"/>
<link:label id="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982_verboseLabel_en-US" xlink:label="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> $1.14 – $2.70 </link:label>
<link:label id="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982_label_en-US" xlink:label="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range One [Member] </link:label>
<link:label id="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982_documentation_en-US" xlink:label="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Range one. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_RangeOneMember" xlink:label="loc_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:to="lab_arc_RangeOneMember_2524E23CDFAF20BBAFA1C58183D11982" xlink:type="arc"/>
<link:label id="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A_verboseLabel_en-US" xlink:label="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> $3.65 – $4.82 </link:label>
<link:label id="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A_label_en-US" xlink:label="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range Two [Member] </link:label>
<link:label id="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A_documentation_en-US" xlink:label="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Range two. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_RangeTwoMember" xlink:label="loc_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:to="lab_arc_RangeTwoMember_522B364EEF32EB773B56C58183D1F13A" xlink:type="arc"/>
<link:label id="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D_verboseLabel_en-US" xlink:label="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> $5.37 – $7.19 </link:label>
<link:label id="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D_label_en-US" xlink:label="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range Three [Member] </link:label>
<link:label id="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D_documentation_en-US" xlink:label="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Range three. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_RangeThreeMember" xlink:label="loc_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:to="lab_arc_RangeThreeMember_01FD67DB2F56ADECD659C58183D1DC5D" xlink:type="arc"/>
<link:label id="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487_verboseLabel_en-US" xlink:label="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> $8.66 – $9.09 </link:label>
<link:label id="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487_label_en-US" xlink:label="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range Four [Member] </link:label>
<link:label id="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487_documentation_en-US" xlink:label="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Range four. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_RangeFourMember" xlink:label="loc_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:to="lab_arc_RangeFourMember_ACA985F6C40C6034A13AC58183D17487" xlink:type="arc"/>
<link:label id="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403_terseLabel_en-US" xlink:label="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> $1.14 – $9.09 </link:label>
<link:label id="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403_label_en-US" xlink:label="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Range Five [Member] [Domain] </link:label>
<link:label id="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403_documentation_en-US" xlink:label="lab_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Range Five [Member] [Domain] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_RangeFiveMemberDomain" xlink:label="loc_arc_RangeFiveMemberDomain_225DFE7EDE57E03B9F03C58183D19403" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_8A095779D13BDF95845EC58183D178EA_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_8A095779D13BDF95845EC58183D178EA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Range of exercise price range minimum (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_8A095779D13BDF95845EC58183D178EA_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_8A095779D13BDF95845EC58183D178EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_611401A4121C0DA8266CC58183D1160E_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_611401A4121C0DA8266CC58183D1160E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Range of exercise price range maximum (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_611401A4121C0DA8266CC58183D1160E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_611401A4121C0DA8266CC58183D1160E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_611401A4121C0DA8266CC58183D1160E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_32E4F56D9690AA9FD8B7C58183D1C244_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_32E4F56D9690AA9FD8B7C58183D1C244" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Share-based compensation arrangement, options, outstanding, number (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_32E4F56D9690AA9FD8B7C58183D1C244_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_32E4F56D9690AA9FD8B7C58183D1C244" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_32E4F56D9690AA9FD8B7C58183D1C244" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_261912E03D8B891F3680C58184D8EAB3_terseLabel_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_261912E03D8B891F3680C58184D8EAB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restructuring </link:label>
<link:label id="lab_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_261912E03D8B891F3680C58184D8EAB3_label_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_261912E03D8B891F3680C58184D8EAB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Restructuring and Related Activities Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_261912E03D8B891F3680C58184D8EAB3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillGross_CECD7FDF7C872C7FFC80C58184C51B71_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillGross_CECD7FDF7C872C7FFC80C58184C51B71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Gross Goodwill </link:label>
<link:label id="lab_us-gaap_GoodwillGross_CECD7FDF7C872C7FFC80C58184C51B71_label_en-US" xlink:label="lab_us-gaap_GoodwillGross_CECD7FDF7C872C7FFC80C58184C51B71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillGross" xlink:label="loc_us-gaap_GoodwillGross_CECD7FDF7C872C7FFC80C58184C51B71" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_A5B4B106553BEAE2F29BC58184C5E11B_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_A5B4B106553BEAE2F29BC58184C5E11B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated Impairment Loss </link:label>
<link:label id="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_A5B4B106553BEAE2F29BC58184C5E11B_label_en-US" xlink:label="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_A5B4B106553BEAE2F29BC58184C5E11B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill, Impaired, Accumulated Impairment Loss </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_A5B4B106553BEAE2F29BC58184C5E11B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Goodwill_68972EA0471659E0D42DC58184C5DB14_totalLabel_en-US" xlink:label="lab_us-gaap_Goodwill_68972EA0471659E0D42DC58184C5DB14" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net Carrying Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_68972EA0471659E0D42DC58184C5DB14" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Property and Equipment </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1E904B6AF08F737ABDCFC5818496794C" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FB3376434399E5D14D35C58184204779_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FB3376434399E5D14D35C58184204779" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Income Tax Provision </link:label>
<link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FB3376434399E5D14D35C58184204779_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FB3376434399E5D14D35C58184204779" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FB3376434399E5D14D35C58184204779" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_A4E7D04A02EFD1825B8AC5818420D30A_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_A4E7D04A02EFD1825B8AC5818420D30A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Deferred Tax Assets and Liabilities </link:label>
<link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_A4E7D04A02EFD1825B8AC5818420D30A_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_A4E7D04A02EFD1825B8AC5818420D30A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Deferred Tax Assets and Liabilities [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_ACB1FA6CC1A1756EB028C581842020EA_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_ACB1FA6CC1A1756EB028C581842020EA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Effective Income Tax Rate Reconciliation </link:label>
<link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_ACB1FA6CC1A1756EB028C581842020EA_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_ACB1FA6CC1A1756EB028C581842020EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_F2D533C1CA3A7BB88DCDC581842FACD9_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_F2D533C1CA3A7BB88DCDC581842FACD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating Leases </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_F2D533C1CA3A7BB88DCDC581842FACD9_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_F2D533C1CA3A7BB88DCDC581842FACD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] </link:label>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_1BC878AFDB7138311DA6C581842F8701_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_1BC878AFDB7138311DA6C581842F8701" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_0A92DEC4AF68C6DF1CC3C581842F1408" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Three Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_189124F5397A2A231722C581843F45FA" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Four Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_1E990A326EA01AFF2BC4C581843FF70D" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C396988819EC3A1BCBDEC581843F0E0D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C396988819EC3A1BCBDEC581843F0E0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C396988819EC3A1BCBDEC581843F0E0D_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C396988819EC3A1BCBDEC581843F0E0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Five Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C396988819EC3A1BCBDEC581843F0E0D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_520CC74C563A843A5AE8C581843FB628_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_520CC74C563A843A5AE8C581843FB628" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_520CC74C563A843A5AE8C581843FB628_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_520CC74C563A843A5AE8C581843FB628" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due Thereafter </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_520CC74C563A843A5AE8C581843FB628" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_AD6856C90D885267A96BC581843FE1ED" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_FD31C6E2BB3752F571A6C581843FB4A6_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_FD31C6E2BB3752F571A6C581843FB4A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Capital Leases </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_FD31C6E2BB3752F571A6C581843FB4A6_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_FD31C6E2BB3752F571A6C581843FB4A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_FD31C6E2BB3752F571A6C581843FB4A6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_AB501D32FCC431142468C581843F9F16" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_52B2D2300D2C8A1048D7C581843F3908_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_52B2D2300D2C8A1048D7C581843F3908" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_52B2D2300D2C8A1048D7C581843F3908_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_52B2D2300D2C8A1048D7C581843F3908" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_52B2D2300D2C8A1048D7C581843F3908" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_F33A937584F3949694EEC581843FF48E_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_F33A937584F3949694EEC581843FF48E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_F33A937584F3949694EEC581843FF48E_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_F33A937584F3949694EEC581843FF48E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Three Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_F33A937584F3949694EEC581843FF48E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_0FBC77D79C978946EF6FC581843FF823_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_0FBC77D79C978946EF6FC581843FF823" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_0FBC77D79C978946EF6FC581843FF823_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_0FBC77D79C978946EF6FC581843FF823" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Four Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_0FBC77D79C978946EF6FC581843FF823" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_627D0E5A9260173A1925C581843F308E_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_627D0E5A9260173A1925C581843F308E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_627D0E5A9260173A1925C581843F308E_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_627D0E5A9260173A1925C581843F308E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Five Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_627D0E5A9260173A1925C581843F308E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_FE26E4B32AB226758B36C581843F2380_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_FE26E4B32AB226758B36C581843F2380" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due Thereafter </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_FE26E4B32AB226758B36C581843F2380" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_7F8C50959106392A0465C581843FF1A6_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_7F8C50959106392A0465C581843FF1A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due </link:label>
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<link:label id="lab_us-gaap_MachineryAndEquipmentMember_062D7AB7D2B22A675105C58184966A37_terseLabel_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentMember_062D7AB7D2B22A675105C58184966A37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Machinery and equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_062D7AB7D2B22A675105C58184966A37" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Buildings and leasehold improvements </link:label>
<link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560_label_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Building and Building Improvements [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560" xlink:to="lab_us-gaap_BuildingAndBuildingImprovementsMember_01BFDCEA55DA33522F73C58184964560" xlink:type="arc"/>
<link:label id="lab_us-gaap_FurnitureAndFixturesMember_22C6F692734C38AED946C5818496ED1B_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_22C6F692734C38AED946C5818496ED1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Furniture and fixtures </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_22C6F692734C38AED946C5818496ED1B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_22C6F692734C38AED946C5818496ED1B" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_22C6F692734C38AED946C5818496ED1B" xlink:type="arc"/>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF_terseLabel_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, gross </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF_label_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, Before Accumulated Depreciation And Amortization </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF_documentation_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, Before Accumulated Depreciation And Amortization </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization" xlink:label="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_FA47963C54364D10DEFBC58184963CFF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, gross </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross_9A793F67EAAD4D89838BC5818496E396" xlink:type="arc"/>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B_negatedLabel_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated depreciation </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B_label_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, Accumulated Depreciation And Amortization </link:label>
<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B_documentation_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Property, Plant, And Equipment And Finance Lease Right-Of-Use Asset, Accumulated Depreciation And Amortization </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization" xlink:label="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_082702EEA8EC5E43786CC5818496395B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4849F3B01D2EB00900F8C581849647A2_negatedLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4849F3B01D2EB00900F8C581849647A2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated depreciation </link:label>
<link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4849F3B01D2EB00900F8C581849647A2_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4849F3B01D2EB00900F8C581849647A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4849F3B01D2EB00900F8C581849647A2" xlink:type="locator"/>
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<link:label id="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_03F54886F113B15A7DEDC5818496A94E_totalLabel_en-US" xlink:label="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_03F54886F113B15A7DEDC5818496A94E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment total </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:label="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_03F54886F113B15A7DEDC5818496A94E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_03F54886F113B15A7DEDC5818496A94E" xlink:to="lab_arc_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_03F54886F113B15A7DEDC5818496A94E" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_FCF4755B2EFFA2B51ED7C5818496E59D_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_FCF4755B2EFFA2B51ED7C5818496E59D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment total </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_FCF4755B2EFFA2B51ED7C5818496E59D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351_terseLabel_en-US" xlink:label="lab_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Trade names and trademarks </link:label>
<link:label id="lab_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351_label_en-US" xlink:label="lab_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Trademarks and Trade Names [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksAndTradeNamesMember" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351" xlink:to="lab_us-gaap_TrademarksAndTradeNamesMember_6D7BA49E417E0C1A07EFC58184B53351" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Gross Carrying Amount </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsGross_AC59CAC57A2C00D170F6C58184B5955B" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_798FF084C71B34156FAEC58184B5F4C1_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_798FF084C71B34156FAEC58184B5F4C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated Amortization </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_798FF084C71B34156FAEC58184B5F4C1_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_798FF084C71B34156FAEC58184B5F4C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Accumulated Amortization </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_798FF084C71B34156FAEC58184B5F4C1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_274AA16641531598237DC58184B58282_totalLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_274AA16641531598237DC58184B58282" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net Carrying Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_274AA16641531598237DC58184B58282" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Depreciation_1E6C8CD9A7DC95AB3251C58184862915_verboseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_1E6C8CD9A7DC95AB3251C58184862915" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Depreciation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_1E6C8CD9A7DC95AB3251C58184862915" xlink:type="locator"/>
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<link:label id="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC_terseLabel_en-US" xlink:label="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Operating and Financing Lease Components and Classification </link:label>
<link:label id="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC_label_en-US" xlink:label="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets And Liabilities, Lessee [Table Text Block] </link:label>
<link:label id="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC_documentation_en-US" xlink:label="lab_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Assets And Liabilities, Lessee [Table Text Block] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_AssetsAndLiabilitiesLesseeTableTextBlock" xlink:label="loc_arc_AssetsAndLiabilitiesLesseeTableTextBlock_16BB8792793E7F5E84E5C581845ECDBC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeaseCostTableTextBlock_8EE162BF8ED8823BBDA5C581845E5EBA_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseCostTableTextBlock_8EE162BF8ED8823BBDA5C581845E5EBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Lease Costs and Supplemental Costs </link:label>
<link:label id="lab_us-gaap_LeaseCostTableTextBlock_8EE162BF8ED8823BBDA5C581845E5EBA_label_en-US" xlink:label="lab_us-gaap_LeaseCostTableTextBlock_8EE162BF8ED8823BBDA5C581845E5EBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease, Cost [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_80532703329B0116AE62C581845E01BD_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_80532703329B0116AE62C581845E01BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Operating Lease Liability Maturity </link:label>
<link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_80532703329B0116AE62C581845E01BD_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_80532703329B0116AE62C581845E01BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessee, Operating Lease, Liability, Maturity [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_6D59FE690594E0DCE9B3C581846E7244_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_6D59FE690594E0DCE9B3C581846E7244" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Financing Lease Liability Maturity </link:label>
<link:label id="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_6D59FE690594E0DCE9B3C581846E7244_label_en-US" xlink:label="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_6D59FE690594E0DCE9B3C581846E7244" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finance Lease, Liability, Maturity [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_AD44553896F098F27C94C581846EFD90_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_AD44553896F098F27C94C581846EFD90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Operating Lease Maturities, before Adoption of 842 </link:label>
<link:label id="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_AD44553896F098F27C94C581846EFD90_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_AD44553896F098F27C94C581846EFD90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0DDFAA34E0C9BBA16220C581846E0CBA_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0DDFAA34E0C9BBA16220C581846E0CBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Capital Lease Maturities, before Adoption of 842 </link:label>
<link:label id="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0DDFAA34E0C9BBA16220C581846E0CBA_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0DDFAA34E0C9BBA16220C581846E0CBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0DDFAA34E0C9BBA16220C581846E0CBA" xlink:type="locator"/>
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<link:label id="lab_arc_ManagedPrintServicesMember_C111330C26DAF134D48EC581842FAA2A_terseLabel_en-US" xlink:label="lab_arc_ManagedPrintServicesMember_C111330C26DAF134D48EC581842FAA2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> MPS </link:label>
<link:label id="lab_arc_ManagedPrintServicesMember_C111330C26DAF134D48EC581842FAA2A_label_en-US" xlink:label="lab_arc_ManagedPrintServicesMember_C111330C26DAF134D48EC581842FAA2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Managed Print Services [Member] </link:label>
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<link:label id="lab_us-gaap_EquipmentMember_D4B124612B5D748034FEC581842FA04E_terseLabel_en-US" xlink:label="lab_us-gaap_EquipmentMember_D4B124612B5D748034FEC581842FA04E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equipment Subject to Leases </link:label>
<link:label id="lab_us-gaap_EquipmentMember_D4B124612B5D748034FEC581842FA04E_label_en-US" xlink:label="lab_us-gaap_EquipmentMember_D4B124612B5D748034FEC581842FA04E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equipment [Member] </link:label>
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<link:label id="lab_us-gaap_LeaseIncome_DE2DA180D4E66949311EC581842F6DED_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseIncome_DE2DA180D4E66949311EC581842F6DED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Rental income </link:label>
<link:label id="lab_us-gaap_LeaseIncome_DE2DA180D4E66949311EC581842F6DED_label_en-US" xlink:label="lab_us-gaap_LeaseIncome_DE2DA180D4E66949311EC581842F6DED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lease Income </link:label>
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<link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8B0363FF42B42DE15D8DC581842F39D3_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8B0363FF42B42DE15D8DC581842F39D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Service income </link:label>
<link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8B0363FF42B42DE15D8DC581842F39D3_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8B0363FF42B42DE15D8DC581842F39D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue from Contract with Customer, Excluding Assessed Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8B0363FF42B42DE15D8DC581842F39D3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinanceLeaseRightOfUseAsset_19A181F913463147AE2FC581842FC4D3_verboseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeaseRightOfUseAsset_19A181F913463147AE2FC581842FC4D3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAsset" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_19A181F913463147AE2FC581842FC4D3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtAndCapitalLeasesDisclosuresTextBlock_929098F78445B99496CFC5818486B497_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndCapitalLeasesDisclosuresTextBlock_929098F78445B99496CFC5818486B497" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-Term Debt </link:label>
<link:label id="lab_us-gaap_DebtAndCapitalLeasesDisclosuresTextBlock_929098F78445B99496CFC5818486B497_label_en-US" xlink:label="lab_us-gaap_DebtAndCapitalLeasesDisclosuresTextBlock_929098F78445B99496CFC5818486B497" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt and Capital Leases Disclosures [Text Block] </link:label>
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<link:label id="lab_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_43A11808AC3DDDA38C69C58184E8A069_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_43A11808AC3DDDA38C69C58184E8A069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> New Accounting Pronouncements or Change in Accounting Principle [Table] </link:label>
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<link:label id="lab_us-gaap_OperatingLeaseLiability_11340DA97826DAB48D8DC58184E89EFB_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_11340DA97826DAB48D8DC58184E89EFB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Operating lease liabilities </link:label>
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<link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_3FB42F4F7DB4FFCD3832C5818400EA12_verboseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_3FB42F4F7DB4FFCD3832C5818400EA12" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Employee Stock Purchase Plan and Stock Plan </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_D0C09339912919A44E78C58183E1A17F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_34326E0992F0BF6BCEF7C58183E13216_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_34326E0992F0BF6BCEF7C58183E13216" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Ending balance (in shares) </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_0761BD645BC59F38B408C58183E1BB07_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_0761BD645BC59F38B408C58183E1BB07" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested or expected to vest (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_0761BD645BC59F38B408C58183E1BB07_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_0761BD645BC59F38B408C58183E1BB07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_41E8A2C844B9B1D8331DC58183E118F5_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_41E8A2C844B9B1D8331DC58183E118F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercisable (in shares) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_41E8A2C844B9B1D8331DC58183E118F5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_986C695DE4033706E6DFC58183E1408D_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_986C695DE4033706E6DFC58183E1408D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted Average Exercise Price </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_986C695DE4033706E6DFC58183E1408D_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_986C695DE4033706E6DFC58183E1408D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_986C695DE4033706E6DFC58183E1408D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_AA2D0071F317220E521FC58183E1C7B5_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_AA2D0071F317220E521FC58183E1C7B5" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Beginning balance (in dollars per share) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_AA2D0071F317220E521FC58183E1C7B5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_A012DE21907DF797318AC58183E1A73F_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_A012DE21907DF797318AC58183E1A73F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Granted (in dollars per share) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_A012DE21907DF797318AC58183E1A73F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_E916C115140DAA045DA5C58183E15D57_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_E916C115140DAA045DA5C58183E15D57" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Exercised (in dollars per share) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_E916C115140DAA045DA5C58183E15D57" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_F2EB63603C7B9DA5C5B8C58183E1E10C_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_F2EB63603C7B9DA5C5B8C58183E1E10C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Forfeited/canceled (in dollars per share) </link:label>
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<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C535AC927F74EACBE712C58183E1CFF1" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C535AC927F74EACBE712C58183E1CFF1" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested or expected to vest (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_F179BCEAA6550BC96B63C58183E1E070" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercisable (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_86F0D7C79FD55D982656C58183E140FE" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted Average Contractual Life (In years) and Aggregate Intrinsic Value </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_D9135530F8C754125FD2C58183E143B8" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average contractual life (in years), outstanding </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_43AE410ABC45C9B27F12C58183E122B6" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC_verboseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average contractual life (in years), vested or expected to vest </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_D5BA8DF56B259F49FE67C58183E1C7AC" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3_verboseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average contractual life (in years), exercisable </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_F051BE1B2E840FF14F1BC58183E11ED3" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate intrinsic value, outstanding </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_A66A8531860757047D7DC58183E195B4" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate intrinsic value, vested or expected to vest </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_77B35DED69A9169309E2C58183E15A77" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate intrinsic value, exercisable </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_E9844CBCCBEA47DFA22AC58183E1AA81" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensation_69ADCF3B178730E4F6CDC58184F8FA90_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_69ADCF3B178730E4F6CDC58184F8FA90" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Total stock-based compensation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_69ADCF3B178730E4F6CDC58184F8FA90" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_69ADCF3B178730E4F6CDC58184F8FA90" xlink:to="lab_us-gaap_ShareBasedCompensation_69ADCF3B178730E4F6CDC58184F8FA90" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average fair value of option (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E7BBE11124ACA4587B6DC58184F8AB59" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average assumptions used: </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_7F37A6130DABDB7AC808C58184F8D275" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Risk free interest rate </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_793EBB5EFE572B093622C58184F89FDF" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Expected volatility </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_4E9578E073EB89D7EE2DC58184F8C47C" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Expected dividend yield </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_CB5AD897C491FC035225C58184F8497A" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Expected term of stock options granted </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_B50B2869040F53FBC2FAC58184F81B9D" xlink:type="arc"/>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D_verboseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Total unrecognized stock-based compensation </link:label>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_33818EA2C5661619D1DDC58184F85A0D" xlink:type="arc"/>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_F8C496E5D0CF7860E3EAC58184F8F5FD_verboseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_F8C496E5D0CF7860E3EAC58184F8F5FD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Expected weighted-average period to recognize compensation cost </link:label>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_F8C496E5D0CF7860E3EAC58184F8F5FD_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_F8C496E5D0CF7860E3EAC58184F8F5FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_F8C496E5D0CF7860E3EAC58184F8F5FD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan [Table] </link:label>
<link:label id="lab_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanTable" xlink:label="loc_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB" xlink:to="lab_us-gaap_DefinedContributionPlanTable_335FF8A3D23ECA0FB1CBC58183C622EB" xlink:type="arc"/>
<link:label id="lab_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84_terseLabel_en-US" xlink:label="lab_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Title of Individual [Axis] </link:label>
<link:label id="lab_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84_label_en-US" xlink:label="lab_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Title of Individual [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84" xlink:to="lab_srt_TitleOfIndividualAxis_7A9AE882DAE007FDDBB9C58183C61C84" xlink:type="arc"/>
<link:label id="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B_terseLabel_en-US" xlink:label="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Title of Individual [Domain] </link:label>
<link:label id="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B_label_en-US" xlink:label="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Title of Individual [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B" xlink:to="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_B9E5DC460DFEDE9E0472C58183C71A0B" xlink:type="arc"/>
<link:label id="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381_terseLabel_en-US" xlink:label="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Eligible Employees </link:label>
<link:label id="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381_label_en-US" xlink:label="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Eligible Employees [Member] </link:label>
<link:label id="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381_documentation_en-US" xlink:label="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Eligible Employees [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_EligibleEmployeesMember" xlink:label="loc_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:to="lab_arc_EligibleEmployeesMember_00DF3AEAF90D29F3EC99C58183C71381" xlink:type="arc"/>
<link:label id="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066_terseLabel_en-US" xlink:label="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Highly Compensated Employees </link:label>
<link:label id="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066_label_en-US" xlink:label="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Highly Compensated Employees [Member] </link:label>
<link:label id="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066_documentation_en-US" xlink:label="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Highly Compensated Employees [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_HighlyCompensatedEmployeesMember" xlink:label="loc_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:to="lab_arc_HighlyCompensatedEmployeesMember_2A16B267DDD041194503C58183C73066" xlink:type="arc"/>
<link:label id="lab_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan Disclosure [Line Items] </link:label>
<link:label id="lab_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan Disclosure [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B" xlink:to="lab_us-gaap_DefinedContributionPlanDisclosureLineItems_025E70B3D58780B5C285C58183C77E2B" xlink:type="arc"/>
<link:label id="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_10848BD2919BA3BC05B7C58183C7F3D1_verboseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_10848BD2919BA3BC05B7C58183C7F3D1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Employee contribution </link:label>
<link:label id="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_10848BD2919BA3BC05B7C58183C7F3D1_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_10848BD2919BA3BC05B7C58183C7F3D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:label="loc_us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_10848BD2919BA3BC05B7C58183C7F3D1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_B89D7CCBC81824D7A781C58183C83EAC_verboseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_B89D7CCBC81824D7A781C58183C83EAC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Employer contribution </link:label>
<link:label id="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_B89D7CCBC81824D7A781C58183C83EAC_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_B89D7CCBC81824D7A781C58183C83EAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan, Employer Matching Contribution, Percent of Match </link:label>
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<link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_C4415B41617F99DF00DBC5818420E41A_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_C4415B41617F99DF00DBC5818420E41A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Disclosure [Text Block] </link:label>
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<link:label id="lab_us-gaap_PlanNameAxis_5DBD096F661964DEDD58C58183F048A0_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis_5DBD096F661964DEDD58C58183F048A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Plan Name [Axis] </link:label>
<link:label id="lab_us-gaap_PlanNameAxis_5DBD096F661964DEDD58C58183F048A0_label_en-US" xlink:label="lab_us-gaap_PlanNameAxis_5DBD096F661964DEDD58C58183F048A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Plan Name [Axis] </link:label>
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<link:label id="lab_us-gaap_PlanNameDomain_7CEE72E90CB0B17B9990C58183F08876_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameDomain_7CEE72E90CB0B17B9990C58183F08876" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Plan Name [Domain] </link:label>
<link:label id="lab_us-gaap_PlanNameDomain_7CEE72E90CB0B17B9990C58183F08876_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain_7CEE72E90CB0B17B9990C58183F08876" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Plan Name [Domain] </link:label>
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<link:label id="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50_verboseLabel_en-US" xlink:label="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> ESPP </link:label>
<link:label id="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50_label_en-US" xlink:label="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Employee Stock Purchase Plan [Member] </link:label>
<link:label id="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50_documentation_en-US" xlink:label="lab_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Employee Stock Purchase Plan [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_EmployeeStockPurchasePlanMember" xlink:label="loc_arc_EmployeeStockPurchasePlanMember_D81CE54982FC1FE5D6CBC58183F08C50" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GranteeStatusAxis_016A7D42160913F1336FC58183F017FF_terseLabel_en-US" xlink:label="lab_us-gaap_GranteeStatusAxis_016A7D42160913F1336FC58183F017FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Grantee Status [Axis] </link:label>
<link:label id="lab_us-gaap_GranteeStatusAxis_016A7D42160913F1336FC58183F017FF_label_en-US" xlink:label="lab_us-gaap_GranteeStatusAxis_016A7D42160913F1336FC58183F017FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Grantee Status [Axis] </link:label>
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<link:label id="lab_us-gaap_GranteeStatusDomain_72D1EFD6ECEA94F8FE6FC58183F09E35_terseLabel_en-US" xlink:label="lab_us-gaap_GranteeStatusDomain_72D1EFD6ECEA94F8FE6FC58183F09E35" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Grantee Status [Domain] </link:label>
<link:label id="lab_us-gaap_GranteeStatusDomain_72D1EFD6ECEA94F8FE6FC58183F09E35_label_en-US" xlink:label="lab_us-gaap_GranteeStatusDomain_72D1EFD6ECEA94F8FE6FC58183F09E35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Grantee Status [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GranteeStatusDomain" xlink:label="loc_us-gaap_GranteeStatusDomain_72D1EFD6ECEA94F8FE6FC58183F09E35" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedPaymentArrangementEmployeeMember_C4AA5FB53A746FE2F541C58183F0187F_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedPaymentArrangementEmployeeMember_C4AA5FB53A746FE2F541C58183F0187F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Key Employees </link:label>
<link:label id="lab_us-gaap_ShareBasedPaymentArrangementEmployeeMember_C4AA5FB53A746FE2F541C58183F0187F_label_en-US" xlink:label="lab_us-gaap_ShareBasedPaymentArrangementEmployeeMember_C4AA5FB53A746FE2F541C58183F0187F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Employee [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedPaymentArrangementEmployeeMember" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_C4AA5FB53A746FE2F541C58183F0187F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_D92D8BD3EBD047C54C5BC58183F0F574_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_D92D8BD3EBD047C54C5BC58183F0F574" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Non-employee Board Members </link:label>
<link:label id="lab_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_D92D8BD3EBD047C54C5BC58183F0F574_label_en-US" xlink:label="lab_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_D92D8BD3EBD047C54C5BC58183F0F574" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Nonemployee [Member] </link:label>
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<link:label id="lab_arc_EmployeeStockPurchasePlanEligibleNumberOfSharePerEmployee_2BD45EA41E850EE69E0DC58183F0E629_verboseLabel_en-US" xlink:label="lab_arc_EmployeeStockPurchasePlanEligibleNumberOfSharePerEmployee_2BD45EA41E850EE69E0DC58183F0E629" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Common stock, shares (in shares) </link:label>
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<link:label id="lab_arc_EmployeeStockPurchasePlanAggregateFairMarketValueOfCommonStock_8486A821BA4F3538C288C58183F0F333_verboseLabel_en-US" xlink:label="lab_arc_EmployeeStockPurchasePlanAggregateFairMarketValueOfCommonStock_8486A821BA4F3538C288C58183F0F333" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate fair market value of common stock </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Share-based compensation, expense </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Plan Modification, Incremental Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_D010DA47CC8DE8C15D30C58183F0EFAF" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Shares authorized under the plan (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_25EEBC11C8D95C27ADCAC58183F0D12E" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Shares available under Stock Plan (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_7DD6BCA6DB93D1CD1A3EC58183F0B6B4" xlink:type="arc"/>
<link:label id="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26_verboseLabel_en-US" xlink:label="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Maturity period of share </link:label>
<link:label id="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26_label_en-US" xlink:label="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Period </link:label>
<link:label id="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26_documentation_en-US" xlink:label="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Share based compensation arrangement by share based payment award options expiration period. </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod" xlink:label="loc_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:to="lab_arc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationPeriod_108865C211EEC3E8D6D6C58183F04A26" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Vesting period </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_93A4D59137F2EC2431F9C58183F0020F" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Expiration period </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_51F7EF84BD1AD400AB08C58183F03699" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_366B5B148DFC22D1F7B0C58183F08774_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_366B5B148DFC22D1F7B0C58183F08774" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercised (in shares) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_366B5B148DFC22D1F7B0C58183F08774" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_366B5B148DFC22D1F7B0C58183F08774" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_366B5B148DFC22D1F7B0C58183F08774" xlink:type="arc"/>
<link:label id="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81_verboseLabel_en-US" xlink:label="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Fair market value of restricted stock </link:label>
<link:label id="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81_label_en-US" xlink:label="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other Than Option, Grants in Period, Grant Date Fair Value </link:label>
<link:label id="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81_documentation_en-US" xlink:label="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other Than Option, Grants in Period, Grant Date Fair Value </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue" xlink:label="loc_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:to="lab_arc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentOtherThanOptionGrantsinPeriodGrantDateFairValue_13903A8F39B4667255D6C58183F0AD81" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7685E5C705E5EBD19887C58183F08F7E_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7685E5C705E5EBD19887C58183F08F7E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Shares, granted (in shares) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7685E5C705E5EBD19887C58183F08F7E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7685E5C705E5EBD19887C58183F08F7E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7685E5C705E5EBD19887C58183F08F7E" xlink:type="arc"/>
<link:label id="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18_terseLabel_en-US" xlink:label="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of employees </link:label>
<link:label id="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18_label_en-US" xlink:label="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of employee </link:label>
<link:label id="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18_documentation_en-US" xlink:label="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Number of employee </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_Numberofemployee" xlink:label="loc_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:to="lab_arc_Numberofemployee_1CC39D11DDDECEADE787C58183F0FF18" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested in period </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_5C0309E322D728C15B9DC58183F03BF4" xlink:type="arc"/>
<link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27_verboseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Summary of Significant Accounting Policies </link:label>
<link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Significant Accounting Policies [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock_B56CBCDCF3C33BD2D6FFC58185B1FC27" xlink:type="arc"/>
<link:label id="lab_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6_label_en-US" xlink:label="lab_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Document And Entity Information [Abstract] </link:label>
<link:label id="lab_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6_documentation_en-US" xlink:label="lab_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Document and Entity Information [Abstract] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_DocumentAndEntityInformationAbstract" xlink:label="loc_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6" xlink:to="lab_arc_DocumentAndEntityInformationAbstract_B335B8F2C0878F307069C581869116C6" xlink:type="arc"/>
<link:label id="lab_dei_DocumentType_54659850CE2782535B2DC5818691A779_terseLabel_en-US" xlink:label="lab_dei_DocumentType_54659850CE2782535B2DC5818691A779" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Document Type </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Forfeited/canceled (in dollars per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F3032440271B37C34ECDC58183E10906" xlink:type="arc"/>
<link:label id="lab_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Disaggregation of Revenue [Table] </link:label>
<link:label id="lab_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Disaggregation of Revenue [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40" xlink:to="lab_us-gaap_DisaggregationOfRevenueTable_4BB53198B6205E04F7EBC5818517DB40" xlink:type="arc"/>
<link:label id="lab_us-gaap_ServiceMember_1F8E1EFEC7B92C7DB5EAC58185175BD4_verboseLabel_en-US" xlink:label="lab_us-gaap_ServiceMember_1F8E1EFEC7B92C7DB5EAC58185175BD4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Service Sales </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ServiceMember" xlink:label="loc_us-gaap_ServiceMember_1F8E1EFEC7B92C7DB5EAC58185175BD4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServiceMember_1F8E1EFEC7B92C7DB5EAC58185175BD4" xlink:to="lab_us-gaap_ServiceMember_1F8E1EFEC7B92C7DB5EAC58185175BD4" xlink:type="arc"/>
<link:label id="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6_verboseLabel_en-US" xlink:label="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> CDIM </link:label>
<link:label id="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6_label_en-US" xlink:label="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> CDIM [Member] </link:label>
<link:label id="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6_documentation_en-US" xlink:label="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> CDIM [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_CDIMMember" xlink:label="loc_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:to="lab_arc_CDIMMember_D9373EBD661DA01C1A4EC5818517ABB6" xlink:type="arc"/>
<link:label id="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6_terseLabel_en-US" xlink:label="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> MPS </link:label>
<link:label id="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6_label_en-US" xlink:label="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> MPS [Member] </link:label>
<link:label id="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6_documentation_en-US" xlink:label="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> MPS [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_MPSMember" xlink:label="loc_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:to="lab_arc_MPSMember_60DE0C534440A91EB6CBC5818517F0A6" xlink:type="arc"/>
<link:label id="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78_verboseLabel_en-US" xlink:label="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> AIM </link:label>
<link:label id="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78_label_en-US" xlink:label="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> AIM [Member] </link:label>
<link:label id="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78_documentation_en-US" xlink:label="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> AIM [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_AIMMember" xlink:label="loc_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:to="lab_arc_AIMMember_95082A09C04440B55B33C58185172E78" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProductMember_3557B75B9B51113477C3C5818517C770_verboseLabel_en-US" xlink:label="lab_us-gaap_ProductMember_3557B75B9B51113477C3C5818517C770" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Equipment and Supplies Sales </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_3557B75B9B51113477C3C5818517C770" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductMember_3557B75B9B51113477C3C5818517C770" xlink:to="lab_us-gaap_ProductMember_3557B75B9B51113477C3C5818517C770" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339_terseLabel_en-US" xlink:label="lab_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Shipping and Handling </link:label>
<link:label id="lab_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339_label_en-US" xlink:label="lab_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Shipping and Handling [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShippingAndHandlingMember" xlink:label="loc_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339" xlink:to="lab_us-gaap_ShippingAndHandlingMember_27B307635983967071E5C5818517D339" xlink:type="arc"/>
<link:label id="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D_terseLabel_en-US" xlink:label="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Software Licensing Activities </link:label>
<link:label id="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D_label_en-US" xlink:label="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Software Licensing [Member] </link:label>
<link:label id="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D_documentation_en-US" xlink:label="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Software Licensing [Member] </link:label>
<link:loc xlink:href="arc-20191231.xsd#arc_SoftwareLicensingMember" xlink:label="loc_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:to="lab_arc_SoftwareLicensingMember_B5CCF9EF41BDCF3132C3C5818517517D" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500_terseLabel_en-US" xlink:label="lab_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Product Concentration Risk </link:label>
<link:label id="lab_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500_label_en-US" xlink:label="lab_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Product Concentration Risk [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductConcentrationRiskMember" xlink:label="loc_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500" xlink:to="lab_us-gaap_ProductConcentrationRiskMember_3721331822D21EA7248EC5818517E500" xlink:type="arc"/>
<link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Disaggregation of Revenue [Line Items] </link:label>
<link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Disaggregation of Revenue [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248" xlink:to="lab_us-gaap_DisaggregationOfRevenueLineItems_0DFD8AC34D657D29A809C5818527B248" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_9FA1CA07CB2909328664C581852708F7_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_9FA1CA07CB2909328664C581852708F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Description of timing </link:label>
<link:label id="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_9FA1CA07CB2909328664C581852708F7_label_en-US" xlink:label="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_9FA1CA07CB2909328664C581852708F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue, Performance Obligation, Description of Timing </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuePerformanceObligationDescriptionOfTiming" xlink:label="loc_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_9FA1CA07CB2909328664C581852708F7" xlink:type="locator"/>
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4 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/29/24  Arc Document Solutions, Inc.      10-K       12/31/23   85:8.6M
 2/23/23  Arc Document Solutions, Inc.      10-K       12/31/22   82:9.1M
 2/24/22  Arc Document Solutions, Inc.      10-K       12/31/21   81:9M
 2/24/21  Arc Document Solutions, Inc.      10-K       12/31/20   82:9M
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