13.10 (LO 3) Suppose selected comparative statement data for the giant bookseller Barnes & Noble are presented here. All balance sheet data are as of the end of the fiscal year (in millions) Comute selected ratios Net sales Cost of goods sold Net income Accounts receivable Inventory Total assets Total common stockholders' equity 2020 $5,121.8 3,540.6 75.9 81.0 1.203.5 2,993.9 921.6 2019 $5,286.7 3,679.8 135.8 107.1 1,3582 3,249.8 1,074,7 Instructions Compute the following ratios for 2020. a. Profit margin. b. Asset turnover c. Return on assets. d. Return on common stockholders' equity. e. Gross profit rate