Required: a. Firm D has net income of $64,296, sales of $1,368,000, and average total assets of $760,000. Calculate the firm's margin, turnover, and ROI. b. Firm E has net income of $120,218, sales of $1,939,000, and ROI of 8.68%. Calculate the firm's turnover and average total assets. c. Firm F has ROI of 12.40%, average total assets of $1,540,000, and turnover of 0.8. Calculate the firm's sales, margin, and net income. Complete this question by entering your answers in the tabs below. Required A Required B Required C Firm D has net income of $64,296, sales of $1,368,000, and average total assets of $760,000. Calculate the firm's margin, turnover, and ROI. Note: Do not round intermediate calculations. Round your answers to 2 decimal places. Margin Turnover ROI % % < Required A Required B >