Exercise 3-11 (Algo) ROI analysis using the DuPont model LO 3 Required: a. Firm A has a margin of 10%, sales of $520,000, and ROI of 18%. Calculate the firm's average total assets. b. Firm B has net income of $70,000, turnover of 1.50, and average total assets of $860,000. Calculate the firm's sales, margin, and ROI. c. Firm C has net income of $142,000, turnover of 2.01, and ROI of 23.80%. Calculate the firm's margin, sales, and average total assets. Complete this question by entering your answers in the tabs below. Required A Required B Required C Firm A has a margin of 10%, sales of $520,000, and ROI of 18%. Calculate the firm's average total assets. (Round "Turnover" to 1 decimal place.) Average total assets