a. Firm A has a margin of 11%, sales of $560,000, and ROI of 19%. Calculate the firm's average total assets. b. Firm B has net income of $72,000, turnover of 1.20 , and average total assets of $900,000 Calculate the firm's sales, margin, and ROI. c. Firm C has net jncome of $136.000, turnover of 2.01 , and ROI of 23.90%. Calculate the firm's margin, sales, and average total asset Complete this question by entering your answers in the tabs below. Firm B has net income of $72,000, turnover of 1.20 , and average total assets of $900,000. Calculate the firm's sales, margin, and ROI. (Round "Margin" and "ROI" answers to 1 decimal place.)