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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Revenue:    
Total revenue $ 832,912 $ 778,527
Cost of goods sold:    
Total cost of goods sold 462,377 455,186
Gross profit 370,535 323,341
Operating expenses:    
Research and development 130,900 128,633
Selling and marketing 107,066 98,113
General and administrative 42,468 39,243
Amortization of intangible assets 5,853 5,528
Significant asset impairments and restructuring costs 4,472 2,273
Acquisition and integration costs 1,819 1,608
Total operating expenses 292,578 275,398
Income from operations 77,957 47,943
Interest and other income, net 3,646 4,253
Interest expense (8,815) (9,441)
Loss on extinguishment and modification of debt (646) 0
Income before income taxes 72,142 42,755
Provision for income taxes 9,814 9,139
Net income $ 62,328 $ 33,616
Basic net income (loss) per common share (in dollars per share) $ 0.40 $ 0.22
Diluted net income (loss) per potential common share (in dollars per share) $ 0.40 $ 0.21
Weighted average basic common shares outstanding (in shares) 154,334 156,314
Weighted average dilutive potential common shares outstanding (in shares) 155,738 158,174
Products    
Revenue:    
Total revenue $ 687,215 $ 642,532
Cost of goods sold:    
Total cost of goods sold 389,013 380,442
Services    
Revenue:    
Total revenue 145,697 135,995
Cost of goods sold:    
Total cost of goods sold $ 73,364 $ 74,744