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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Apr. 04, 2021 | Mar. 29, 2020
Revenues: |  |  |
Total revenues | [1] | $ 781,606 | $ 704,355
Cost of revenues: |  |  |
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below) |  | 319,988 | 298,805
Gross profit |  | 461,618 | 405,550
Operating expenses: |  |  |
Selling and administrative |  | 129,797 | 111,388
Engineering and development |  | 100,402 | 85,159
Acquired intangible assets amortization |  | 5,536 | 9,891
Restructuring and other |  | (7,130) | (7,606)
Total operating expenses |  | 228,605 | 198,832
Income from operations |  | 233,013 | 206,718
Non-operating (income) expense: |  |  |
Interest income |  | (808) | (2,751)
Interest expense |  | 6,004 | 5,551
Other (income) expense, net |  | 3,824 | 6,849
Income before income taxes |  | 223,993 | 197,069
Income tax provision |  | 18,481 | 20,878
Net income |  | $ 205,512 | $ 176,191
Net income per common share: |  |  |
Basic |  | $ 1.23 | $ 1.06
Diluted |  | $ 1.09 | $ 0.97
Weighted average common shares—basic |  | 166,491 | 166,589
Weighted average common shares—diluted |  | 187,740 | 180,736
Cash dividend declared per common share |  | $ 0.10 | $ 0.10
Product [Member] |  |  |
Revenues: |  |  |
Total revenues |  | $ 660,508 | $ 610,906
Cost of revenues: |  |  |
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below) |  | 267,784 | 259,996
Service [Member] |  |  |
Revenues: |  |  |
Total revenues |  | 121,098 | 93,449
Cost of revenues: |  |  |
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below) |  | $ 52,204 | $ 38,809
[1] | Includes $3.1 million and $1.8 million in 2021 and 2020, respectively, for leases of Teradyne’s systems recognized outside Accounting Standards Codification (“ASC”) 606 “Revenue from Contracts with Customers.”

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