ROI analysis using DuPont model

a. Firm A has a margin of 12%, sales of $600,000, and ROI of 18%. Calculate the firm's average total assets.

b. Firm B has net income of $78,000, turnover of 1.3, and average total assets of $950,000. Calculate the firm's sales, margin, and ROI. Round your percentage answer to one decimal place. C. Firm C has net income of $132,000, turnover of 2.1, and ROI of 7.37%. Cal- culate the firm's margin. Round your percentage answer to one decimal place.