tions: On Consolodated Statements of Income Three Years ended December 31, 2017 (in Millions) Net Revenues Cost of Sales Gross Margin Research and development Marketing, general and administrative Operating expenses: Operating income Gain (losses) on equity method investments, net Gain (losses) on other equity method investments, net Interest and other, net Net Income $ 2017 390,424 $ 289,343 $274,343 2016 2015 290,433 108,545 108,434 99,991 180,798 165,909 9,054 98 343 15,904 84,358 69,064 24,958 84,456 69,407 75,033 96,342 96,502 (45) (9) (890) 9 134 45 78 343 $ 74,143 $ 96,429 $ 96,970 A) Calculate Gross Profit Ratio and Cost of Goods Sold for three years B) Assume Thunder Drive, Inc.'s net revenues for the first four months of 2018 totals $2 billion. Calculate an estimated cost of goods sold and gross profit for the four months. Note: Gross Profit and Gross Margin mean the same thing. Use the 2017 Gross profit ratio for 2018's estimate. Accessibility: Investigate D