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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Revenues $ 267,857 $ 144,297
Cost of sales 146,371 73,933
Gross profit 121,486 70,364
Selling, general and administrative 35,900 28,658
Research and development 31,544 28,292
Operating expenses 67,444 56,950
Income from operations 54,042 13,414
Interest income 651 2,839
Interest expense (32) (583)
Income before income taxes 54,661 15,670
Provision for income taxes 6,298 2,133
Share of results of equity-method investee, net of tax 0 60
Net income $ 48,363 $ 13,477
Net income per share:    
Basic (in dollars per share) $ 0.78 $ 0.21
Diluted (in dollars per share) $ 0.77 $ 0.21
Weighted average shares outstanding:    
Basic (in shares) 61,965 63,557
Diluted (in shares) 62,740 64,139