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 $5,000 3,800 $5,100 3,530 Cost of goods sold Net income 75 145 Accounts receivable 80 114 Inventory 1,307 3,000 Total assets 1,224 3,250 1,092 Total common stockholders' equity 909 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 %