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 $4,950 3,901 2019 $4.900 4,001 191 55 Net sales Cost of goods sold Net income Accounts receivable Inventory Total assets Total common stockholders' equity 104 65 1.250 2,850 910 1,350 3.150 1,070 Compute the following ratios for 2020. (Round asset turnover to 2 decimal places, eg 183 and all other answers to 1 decimal place, eg. 1.8 or 2.5%) (a) Profit margin % (b) Asset turnover times (c) Return on assets % (d) Return on common stockholders' equity % (e) Gross profit rate %