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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues |  |  |
Total revenues | $ 628,414 | $ 544,135 | $ 341,191
Costs and expenses |  |  |
Selling, general and administrative expenses | 51,657 | 40,529 | 27,177
Total costs and expenses | 445,264 | 366,434 | 252,328
Income from operations | 183,150 | 177,701 | 88,863
Interest income (expense), net | 879 | (3,595) | (20,767)
Other income (expense), net | 4,294 | (4,305) |
Income before income taxes | 188,323 | 169,801 | 68,096
Income tax expense | 32,020 | 19,520 | 1,549
Net income | 156,303 | 150,281 | 66,547
Less: pre-IPO net income attributable to Cactus LLC |  | 13,648 | 66,547
Less: net income attributable to non-controlling interest | 70,691 | 84,950 |
Net income attributable to Cactus Inc. | $ 85,612 | $ 51,683 |
Earnings per Class A share - basic |  | $ 1.60 |
Earnings per Class A share - diluted | $ 1.88 | $ 1.58 |
Product revenue |  |  |
Revenues |  |  |
Total revenues | $ 357,087 | $ 290,496 | 189,091
Costs and expenses |  |  |
Cost of revenue | 220,615 | 174,675 | 124,030
Rental revenue |  |  |
Revenues |  |  |
Total revenues | 141,816 | 133,418 | 77,469
Costs and expenses |  |  |
Cost of revenue | 69,829 | 55,015 | 40,519
Field service and other revenue |  |  |
Revenues |  |  |
Total revenues | 129,511 | 120,221 | 74,631
Costs and expenses |  |  |
Cost of revenue | $ 103,163 | $ 96,215 | $ 60,602
Class A Common Stock |  |  |
Costs and expenses |  |  |
Earnings per Class A share - basic | $ 1.90 | $ 1.60 |
Earnings per Class A share - diluted | $ 1.88 | $ 1.58 |
Weighted average Class A shares outstanding - basic | 44,983 | 32,329 |
Weighted average Class A shares outstanding - diluted | 75,353 | 32,695 |

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