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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 02, 2020 | Sep. 27, 2019 | Sep. 28, 2018
Allowance for doubtful accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 2,550 | $ 1,637 | $ 2,231
Additions Charged to Costs and Expenses | 2,095 | 2,003 | 21
Less Deductions | 1,948 | 1,090 | 615
Balance at End of Year | 2,697 | 2,550 | 1,637
Reserves for inventory valuation |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 5,223 | 5,124 | 5,428
Additions Charged to Costs and Expenses | 878 | 1,009 | 394
Less Deductions | 716 | 910 | 698
Balance at End of Year | 5,385 | 5,223 | 5,124
Valuation of deferred tax assets |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 5,964 | 6,402 | 8,724
Additions Charged to Costs and Expenses | 875 | 430 | 1,148
Less Deductions | 315 | 868 | 3,470
Balance at End of Year | 6,524 | 5,964 | 6,402
Reserves for sales returns |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 4,880 | 1,532 | 1,930
Additions Charged to Costs and Expenses | 1,532 | 7,040 | 3,927
Less Deductions | 3,369 | 3,692 | 4,325
Balance at End of Year | $ 3,043 | $ 4,880 | $ 1,532

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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