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Crane Medical manufactures hospital beds and other institutional furniture. The company's comparative balance sheet and income statement for 2019 and 2020 follow. Crane Medical Comparative Balance Sheet As of December 31 2020 2019 Assets Current assets Cash $377,000 $ 417,400 1,048,000 776,450 729.000 681.100 Accounts receivable, net Inventory Other current assets Total current assets Property, plant, & equipment.net 381,300 247.100 2.535.300 2.122,050 8,706.535 8,440,045 Total assets $ 11,241.835 $ 10.562,095 Liabilities and Stockholders' Equity Current liabilities $3,181,000 $ 2,846,100 Long-term debt 3,702,700 3,892,650 Total liabilities 6.883.700 6,738.750 Preferred stock. $5 par value 59,000 59.000 Common stock, $0.25 par value 104,650 103.900 Retained earnings 4.194.485 3.660.445 Total stockholders' equity 4,358.135 3.823,345 Total liabilities and stockholders' equity $ 11.241,835 $ 10.562.095 Crane Medical Comparative Income Statement and Statement of Retained Earnings For the Year 2020 2019 Sales revenue (all on account) $ 10,177.200 $9,613,900 Cost of goods sold 5,612.450 5,298.750 Gross profit 4,564,750 4.315,150 Operating expenses 2,840,250 2,634,150 Net operating income 1.724,500 1,681,000 Interest expense 300,300 308,650 Net income before taxes 1.424.200 1,372,350 Income taxes (30%) 427.260 411,705 Net income $ 996.940 $ 960,645 Dividends paid Preferred dividends 29,500 29,500 Common dividends 433,400 413,050 Total dividends paid 462.900 442,550 Net income retained 534,040 518,095 Retained earnings, beginning of year 3,660,445 3.142,350 Retained earnings, end of year $ 4,194.485 $ 3.660.445 Calculate the following profitability ratios for 2020. (Round answers to 1 decimal place, eg. 50.1%.) a. Gross margin percentage de b. Return on assets % c Return on common stockholders' equity 96