Required: a. Firm A has a margin of 12%, sales of $540,000, and ROI of 17%. Calculate the firm's average total assets. b. Firm B has net income of $74,000, asset turnover of 1.50, and average total assets of $900,000. Calculate the firm's sales, margin, and ROI. c. Firm C has net income of $138,000, asset turnover of 1.91, and ROI of 23.10%. Calculate the firm's margin, sales, and average total assets.

Required: a. Firm A has a margin of 12%, sales of $540,000, and ROI of 17%. Calculate the firm's average total assets. b. Firm B has net income of $74,000, asset tumover of 1,50 , and average total assets of $900,000. Calculate the firm's sales, margin, and ROI. c. Firm C has net income of $138,000, asset turnover of 1.91 , and ROI of 23,10%. Calculate the firm's margin, sales, and average total assets