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SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 02, 2016 | Mar. 28, 2015 | Apr. 02, 2016 | Mar. 28, 2015
Net revenue: |  |  |  |
Net revenue | $ 156,400 | $ 145,227 | $ 264,934 | $ 252,665
Cost of sales : |  |  |  |
Cost of sales | 86,753 | 76,657 | 144,866 | 129,361
Gross profit : |  |  |  |
Gross profit | 69,647 | 68,570 | 120,068 | 123,304
Operating expenses: |  |  |  |
Operating expenses | 57,938 | 58,779 | 110,064 | 103,787
Income from operations: |  |  |  |
Income from operations | 11,709 | 9,791 | 10,004 | 19,517
Equipment [Member] |  |  |  |
Net revenue: |  |  |  |
Net revenue | 141,062 | 129,816 | 234,036 | 220,772
Income from operations: |  |  |  |
Income from operations | 7,716 | 6,307 | 1,290 | 11,753
Expendable Tools [Member] |  |  |  |
Net revenue: |  |  |  |
Net revenue | 15,338 | 15,411 | 30,898 | 31,893
Income from operations: |  |  |  |
Income from operations | $ 3,993 | $ 3,484 | $ 8,714 | $ 7,764

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