In 2019 , net sales amount to $8,800,000, net income is $700,000, and preferred stock dividends paid are $70,000. Required Calculate the following ratios for 2019. Round all answers to two decimalplaces. 1. Return on sales % 2. Return on assets % 3. Return on common stockholders' equity % 4. Quick ratio 5. Current ratio 6. Debt-to-equity ratio