Required: a. Firm A has a margin of 12%, sales of $620,000, and ROI of 19%. Calculate the firm's average total assets. b. Firm B has net income of $76,000, turnover of 1.40, and average total assets of $870,000. Calculate the firm's sales, margin, and ROI. c. Firm C has net income of $134,000, turnover of 1.91, and ROI of 23.40%. Calculate the firm's margin, sales, and average total assets. Answer is not complete. Complete this question by entering your answers in the tabs below. Required A Required B Required c Firm A has a margin of 12%, sales of $620,000, and ROI of 19% Calculate the firm's average total assets. (Round "Turnover" to 1 decimal place.) Average total assets $ 391,579