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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenue: |  |  |  |
Total revenues | $ 5,658.6 | $ 5,524.4 | $ 17,345.8 | $ 15,988.9
Cost of sales: |  |  |  |
Total cost of sales | 4,806.0 | 4,701.8 | 14,739.0 | 13,574.7
Gross profit | 852.6 | 822.6 | 2,606.8 | 2,414.2
Selling, general and administrative expenses | 662.8 | 646.1 | 2,001.3 | 1,869.8
Depreciation | 25.9 | 24.3 | 77.2 | 70.0
Operating income | 163.9 | 152.2 | 528.3 | 474.4
Floor plan interest expense | (20.2) | (16.4) | (59.0) | (45.6)
Other interest expense | (28.3) | (27.8) | (86.7) | (79.2)
Equity in earnings of affiliates | 41.7 | 30.9 | 95.0 | 70.9
Income from continuing operations before income taxes | 157.1 | 138.9 | 477.6 | 420.5
Income taxes | (27.1) | (44.7) | (104.7) | (136.0)
Income from continuing operations | 130.0 | 94.2 | 372.9 | 284.5
Income (loss) from discontinued operations, net of tax | 0.1 | 0.1 | 0.2 | (0.3)
Net income | 130.1 | 94.3 | 373.1 | 284.2
Less: (Loss) income attributable to non-controlling interests | (0.1) | (0.1) | 0.2 | 1.0
Net income attributable to Penske Automotive Group common stockholders | $ 130.2 | $ 94.4 | $ 372.9 | $ 283.2
Basic earnings per share attributable to Penske Automotive Group common stockholders: |  |  |  |
Continuing operations (in dollars per share) | $ 1.53 | $ 1.10 | $ 4.37 | $ 3.30
Discontinued operations (in dollars per share) |  |  |  |
Net income attributable to Penske Automotive Group common stockholders (in dollars per share) | $ 1.53 | $ 1.10 | $ 4.37 | $ 3.30
Shares used in determining basic earnings per share (in shares) | 84.9 | 85.9 | 85.2 | 85.9
Diluted earnings per share attributable to Penske Automotive Group common stockholders: |  |  |  |
Continuing operations (in dollars per share) | $ 1.53 | $ 1.10 | $ 4.37 | $ 3.30
Discontinued operations (in dollars per share) |  |  |  |
Net income attributable to Penske Automotive Group common stockholders (in dollars per share) | $ 1.53 | $ 1.10 | $ 4.37 | $ 3.30
Shares used in determining diluted earnings per share (in shares) | 84.9 | 86.0 | 85.3 | 85.9
Amounts attributable to Penske Automotive Group common stockholders: |  |  |  |
Income from continuing operations | $ 130.0 | $ 94.2 | $ 372.9 | $ 284.5
Less: (Loss) income attributable to non-controlling interests | (0.1) | (0.1) | 0.2 | 1.0
Income from continuing operations, net of tax | 130.1 | 94.3 | 372.7 | 283.5
Income (loss) from discontinued operations, net of tax | 0.1 | 0.1 | 0.2 | (0.3)
Net income attributable to Penske Automotive Group common stockholders | $ 130.2 | $ 94.4 | $ 372.9 | $ 283.2
Cash dividends per share (in dollars per share) | $ 0.36 | $ 0.32 | $ 1.05 | $ 0.93
Retail Automotive Dealership |  |  |  |
Revenue: |  |  |  |
Total revenues | $ 5,148.5 | $ 5,085.4 | $ 15,900.0 | $ 14,882.5
Cost of sales: |  |  |  |
Total cost of sales | 4,386.3 | 4,341.2 | 13,561.5 | 12,684.0
Retail Commercial Truck Dealership |  |  |  |
Revenue: |  |  |  |
Total revenues | 385.3 | 299.6 | 1,016.5 | 739.8
Cost of sales: |  |  |  |
Total cost of sales | 327.5 | 255.3 | 859.7 | 619.1
Commercial Vehicle Distribution and Other |  |  |  |
Revenue: |  |  |  |
Total revenues | 124.8 | 139.4 | 429.3 | 366.6
Cost of sales: |  |  |  |
Total cost of sales | $ 92.2 | $ 105.3 | $ 317.8 | $ 271.6

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