Required: a. Firm D has net income of $66,000, sales of $1,300,000, and average total assets of $818,000. Calculate the firm's margin, turnover, and ROI. b. Firm E has net income of $141,000, sales of $2,350,000, and ROI of 10.8%. Calculate the firm's turnover and average total assets. c. Firm F has ROI of 12.60%, average total assets of $1,500,800, and turnover of 1.40. Calculate the firm's sales, margin, and net Income. Answer is not complete. Complete this question by entering your answers in the tabs below. Required A Required B Required C Firm F has ROI of 12.60 %, average total assets of $1,500,800, and turnover of 1.40. Calculate the firm's sales, margin, and net income. Note: Do not round intermediate calculations. Round "Margin" answer to 1 decimal place. Net income Sales Margin %