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Stock-Based Compensation (Tables)
9 Months Ended
Jul. 01, 2023
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense in Consolidated Statements of Operations
The following presents stock-based compensation expense in the Company’s Consolidated Statements of Income:

 Three Months EndedNine Months Ended
 July 1,
2023
June 25,
2022
July 1,
2023
June 25,
2022
Cost of revenues$2.1 $2.2 $7.7 $7.1 
Research and development2.1 1.8 8.6 7.3 
Selling and marketing2.9 2.6 9.2 8.0 
General and administrative9.8 8.7 35.1 29.4 
$16.9 $15.3 $60.6 $51.8 
Weighted-Average Assumptions Utilized to Value Stock Options
The Company uses a binomial model to determine the fair value of its stock options. The weighted-average assumptions utilized to value these stock options are indicated in the following table:

 Three Months EndedNine Months Ended
 July 1,
2023
June 25,
2022
July 1,
2023
June 25,
2022
Risk-free interest rate4.3 %1.1 %4.3 %1.1 %
Expected volatility33.9 %34.2 %33.9 %34.2 %
Expected life (in years)4.84.84.84.8
Dividend yield— — — — 
Weighted average fair value of options granted$30.51 $21.48 $25.95 $21.03