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). 2020 2019 Net sales $4,600 $5,700 Cost of goods sold 3.680 3,394 Net income 83 143 Accounts receivable 73 101 Inventory 1.296 1,243 Total assets 3.190 2.560 Total common stockholders' equity 846 1,079 Compute the following ratios for 2020. (Round asset turnover to 2 decimal places, e.g. 1.67. Round all other answers to 1 decimal place, e.g. 1.6 or 1.6%.) (a) Profit margin % (b) Asset turnover times (c) Return on assets % (d) Return on common stockholders' equity % (e) Gross profit rate %