13 Required: a. Firm A has a margin of 13% sales of $550,000, and ROI of 18% Calculate the firm's average total assets b. Firm fl has net income of $72.000, turnover of 110, and average total assets of $860.000. Calculate the firm's sales, margin, and ROL c. Firm C has net income of $138,000, turnover of 1.91, and ROI of 23.70% Calculate the firm's margin, sales, and average total assets, Complete this question by entering your answers in the tabs below. 10 Required A Required B Required C Firm B has net income of $72,000, turnover of 1.10, and average total assets of $860,000. Calculate the firm's sales, margin, and ROI. (Round "Margin" and "ROI" answers to I decimal place.) Sales Margin ROI %