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EQUITY AWARD PLANS (Tables) | 6 Months Ended
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Jan. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of RSUs Activity | Below is a summary of RSU activity, including MSUs, under the Stock Plans:
| Number of Shares |  | Grant Date Fair Value per Share
| (in thousands) |  |
Outstanding at July 31, 2019 | 22,136 |  |  | $ | 36.72 |
Granted | 10,511 |  |  | $ | 29.47 |
Released | (4,236 | ) |  | $ | 33.72 |
Forfeited | (2,787 | ) |  | $ | 34.34 |
Outstanding at January 31, 2020 | 25,624 |  |  | $ | 34.61 |
Schedule of ESPP Valuation Assumptions | We use the Black-Scholes option pricing model to determine the fair value of shares purchased under the 2016 ESPP with the following weighted average assumptions on the date of grant:
| Six Months Ended January 31,
| 2019 |  | 2020
Expected term (in years) | 0.79 |  |  | 0.92 |
Risk-free interest rate | 2.5 | % |  | 1.9 | %
Volatility | 49.5 | % |  | 68.7 | %
Dividend yield | — | % |  | — | %
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | Total stock-based compensation expense recognized in the condensed consolidated statements of operations is as follows:
| Three Months Ended January 31, |  | Six Months Ended January 31,
| 2019 |  | 2020 |  | 2019 |  | 2020
| (in thousands)
Cost of revenue: |  |  |  |  |  |  |
Product | $ | 872 |  |  | $ | 1,458 |  |  | $ | 1,570 |  |  | $ | 2,570 |
Support, entitlements and other services | 3,373 |  |  | 5,140 |  |  | 6,530 |  |  | 9,891 |
Sales and marketing | 23,462 |  |  | 31,185 |  |  | 46,068 |  |  | 58,960 |
Research and development | 34,679 |  |  | 36,459 |  |  | 65,688 |  |  | 74,022 |
General and administrative | 10,179 |  |  | 11,373 |  |  | 18,634 |  |  | 21,598 |
Total stock-based compensation expense | $ | 72,565 |  |  | $ | 85,615 |  |  | $ | 138,490 |  |  | $ | 167,041 |

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