Years Ended | July 27, 2013 | July 28, 2012 | July 30, 2011 | ||||||||
Cost of sales—product | $ | 40 | $ | 53 | $ | 61 | |||||
Cost of sales—service | 138 | 156 | 177 | ||||||||
Share-based compensation expense in cost of sales | 178 | 209 | 238 | ||||||||
Research and development | 286 | 401 | 481 | ||||||||
Sales and marketing | 484 | 588 | 651 | ||||||||
General and administrative | 175 | 203 | 250 | ||||||||
Restructuring and other charges | (3 | ) | — | — | |||||||
Share-based compensation expense in operating expenses | 942 | 1,192 | 1,382 | ||||||||
Total share-based compensation expense | $ | 1,120 | $ | 1,401 | $ | 1,620 | |||||
Income tax benefit for share-based compensation | $ | 285 | $ | 335 | $ | 444 |