The following information is available for Crest Company: Annual Data Net sales Cost of goods sold Net income Pref dividends declared and paid Year-End Data Total assets Common stockholders' equity 2020 2019 $6,600,000 $6,000,000 4,006,400 3,800,000 310,000 264,000 25,000 Dec. 31, 2020 Dec. 31, 2019 $2,850,000 $2,500,000 1,900,000 1,800,000 Calculate the following ratios for 2020: (Round ratios to one decimal.) a. Gross profit percentage o % b. Profit margin percentage 0 % C. Asset turnover 0 d. Return on assets 0 % e. Return on common stockholders' equity 0 %