Firm D has net income of $83,700, sales of $2,790,000, and average total assets of $1,395,000. Calculate the firm's margin, turnover, and ROI. (Omit the "%" sign in your response.) Margin % Turnover ROI % (b) Firm E has net income of $150,000, sales of $2,500,000, and ROI of 15%. Calculate the firm's turnover and average total assets. (Omit the "$" sign in your response.) Turnover $ Average total assets (c) Firm F has ROI of 12.6%, average total assets of $1,730,159, and turnover of 1.4. Calculate the firm's sales, margin, and net income. (Round your answers to the nearest whole numbers. Omit the "$" and "%" signs in your response.) Net income $ Sales $ Margin %