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QUARTERLY FINANCIAL SUMMARY (UNAUDITED) | 12 Months Ended
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Sep. 28, 2018
Quarterly Financial Data [Abstract] |
QUARTERLY FINANCIAL SUMMARY (UNAUDITED) | QUARTERLY FINANCIAL SUMMARY (UNAUDITED) The following summarizes quarterly operating results for the years presented below:
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
(thousands, except per share data) | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Net sales | $ | 116,579 |  |  | $ | 93,729 |  |  | $ | 165,778 |  |  | $ | 149,807 |  |  | $ | 170,779 |  |  | $ | 155,274 |  |  | $ | 91,132 |  |  | $ | 91,755 |
Gross profit | 48,811 |  |  | 36,565 |  |  | 74,195 |  |  | 64,913 |  |  | 79,333 |  |  | 70,630 |  |  | 39,521 |  |  | 38,832 |
Operating profit (loss) | 7,037 |  |  | 472 |  |  | 26,002 |  |  | 20,458 |  |  | 31,955 |  |  | 24,737 |  |  | (1,973 | ) |  | (76 | )
Income (loss) before income taxes | 8,324 |  |  | (45 | ) |  | 29,445 |  |  | 21,837 |  |  | 31,779 |  |  | 25,560 |  |  | (1,442 | ) |  | 858 |
Income tax expense (benefit) | 8,089 |  |  | (4,101 | ) |  | 7,825 |  |  | 7,878 |  |  | 8,009 |  |  | 9,007 |  |  | 3,514 |  |  | 269 |
Net income (loss) | $ | 235 |  |  | $ | 4,056 |  |  | $ | 21,620 |  |  | $ | 13,959 |  |  | $ | 23,770 |  |  | $ | 16,553 |  |  | $ | (4,956 | ) |  | $ | 589 |
Net income (loss) per common share - Basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A | $ | 0.02 |  |  | $ | 0.41 |  |  | $ | 2.19 |  |  | $ | 1.41 |  |  | $ | 2.40 |  |  | $ | 1.68 |  |  | $ | (0.50 | ) |  | $ | 0.06 |
Class B | $ | 0.02 |  |  | $ | 0.37 |  |  | $ | 1.99 |  |  | $ | 1.28 |  |  | $ | 2.19 |  |  | $ | 1.52 |  |  | $ | (0.46 | ) |  | $ | 0.05 |
Net income (loss) per common share - Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A | $ | 0.02 |  |  | $ | 0.40 |  |  | $ | 2.15 |  |  | $ | 1.39 |  |  | $ | 2.37 |  |  | $ | 1.65 |  |  | $ | (0.49 | ) |  | $ | 0.06 |
Class B | $ | 0.02 |  |  | $ | 0.40 |  |  | $ | 2.15 |  |  | $ | 1.39 |  |  | $ | 2.37 |  |  | $ | 1.65 |  |  | $ | (0.49 | ) |  | $ | 0.06 |
Due to changes in stock prices during the year and the timing of issuance of shares, the cumulative total of quarterly net income (loss) per share amounts may not equal the net income (loss) per share for the entire year.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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