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SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 01, 2017 | Apr. 02, 2016 | Apr. 01, 2017 | Apr. 02, 2016
Net revenue: |  |  |  |
Net revenue | $ 199,613 | $ 156,400 | $ 349,252 | $ 264,934
Cost of sales : |  |  |  |
Cost of sales | 109,322 | 86,753 | 190,643 | 144,866
Gross profit : |  |  |  |
Gross profit | 90,291 | 69,647 | 158,609 | 120,068
Operating expenses: |  |  |  |
Operating expenses | 57,686 | 57,938 | 108,723 | 110,064
Income from operations: |  |  |  |
Income from operations | 32,605 | 11,709 | 49,886 | 10,004
Equipment [Member] |  |  |  |
Net revenue: |  |  |  |
Net revenue | 180,979 | 141,062 | 313,958 | 234,036
Income from operations: |  |  |  |
Income from operations | 28,069 | 7,716 | 40,743 | 1,290
Expendable Tools [Member] |  |  |  |
Net revenue: |  |  |  |
Net revenue | 18,634 | 15,338 | 35,294 | 30,898
Income from operations: |  |  |  |
Income from operations | $ 4,536 | $ 3,993 | $ 9,143 | $ 8,714

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