Required: a. Firm D has net income of $32,000, sales of $890,000, and average total assets of $500,000. Calculate the firm's margin, turnover, and ROI. (Do not round intermediate calculations. Round your answers to 1 decimal place.) Margin Turnover ROI b. Firm E has net income of $62,000, sales of S1 ,000,000, and ROI of 13%. Calculate the firm's turnover and average total assets. (Do not round intermediate calculations. Round "Turnover" answer to 1 decimal place.) Turnover Average total assets c. Firm F has ROI of 12.6%, average total assets of $1,666,600, and turnover of 1.7. Calculate the firm's sales, margin, and net income. (Do not round intermediate calculations. Round "Margin" answer to 1 decimal place.) Net income Sales Margin