Required:

a. Firm A has a margin of 12%, sales of $540,000, and ROI of 17%. Calculate the firm's average total assets. (Round "Turnover" to 1 decimal place.)

b. Firm B has net income of $78,000, turnover of 1.2, and average total assets of $860,000. Calculate the firm's sales, margin, and ROI. (Round "Margin" and "ROI" answers to 1 decimal place.)

c. Firm C has net income of $138,000, turnover of 1.91, and ROI of 23.9%. Calculate the firm's margin, sales, and average total assets. (Round "Margin" answers to 1 decimal place and use the rounded answer for the subsequent computations.)