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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Revenue: |  |
Total revenues | $ 5,746.9 | $ 5,081.1
Cost of sales: |  |
Total cost of sales | 4,882.5 | 4,306.8
Gross profit | 864.4 | 774.3
Selling, general and administrative expenses | 663.1 | 601.7
Depreciation | 25.6 | 22.4
Operating income | 175.7 | 150.2
Floor plan interest expense | (18.9) | (13.7)
Other interest expense | (29.8) | (25.0)
Equity in earnings of affiliates | 17.3 | 13.2
Income from continuing operations before income taxes | 144.3 | 124.7
Income taxes | (36.6) | (41.1)
Income from continuing operations | 107.7 | 83.6
Income (loss) from discontinued operations, net of tax | 0.1 | (0.6)
Net income | 107.8 | 83.0
Less: (Loss) income attributable to non-controlling interests | (0.3) | 0.4
Net income attributable to Penske Automotive Group common stockholders | $ 108.1 | $ 82.6
Basic earnings per share attributable to Penske Automotive Group common stockholders: |  |
Continuing operations (in dollars per share) | $ 1.26 | $ 0.97
Discontinued operations (in dollars per share) | 0.00 | (0.01)
Net income attributable to Penske Automotive Group common stockholders (in dollars per share) | $ 1.26 | $ 0.96
Shares used in determining basic earnings per share (in shares) | 86.0 | 85.6
Diluted earnings per share attributable to Penske Automotive Group common stockholders: |  |
Continuing operations (in dollars per share) | $ 1.26 | $ 0.97
Discontinued operations (in dollars per share) | 0.00 | (0.01)
Net income attributable to Penske Automotive Group common stockholders (in dollars per share) | $ 1.26 | $ 0.96
Shares used in determining diluted earnings per share (in shares) | 86.0 | 85.6
Amounts attributable to Penske Automotive Group common stockholders: |  |
Income from continuing operations | $ 107.7 | $ 83.6
Less: (Loss) income attributable to non-controlling interests | (0.3) | 0.4
Income from continuing operations, net of tax | 108.0 | 83.2
Income (loss) from discontinued operations, net of tax | 0.1 | (0.6)
Net income attributable to Penske Automotive Group common stockholders | $ 108.1 | $ 82.6
Cash dividends per share (in dollars per share) | $ 0.34 | $ 0.30
Retail Automotive Dealership |  |
Revenue: |  |
Total revenues | $ 5,296.0 | $ 4,756.4
Cost of sales: |  |
Total cost of sales | 4,517.7 | 4,048.1
Retail Commercial Truck Dealership |  |
Revenue: |  |
Total revenues | 292.4 | 211.7
Cost of sales: |  |
Total cost of sales | 245.8 | 175.3
Commercial Vehicle Distribution and Other |  |
Revenue: |  |
Total revenues | 158.5 | 113.0
Cost of sales: |  |
Total cost of sales | $ 119.0 | $ 83.4

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