Firm A has a margin of 10%, sales of $570,000, and ROI of 19%. Calculate the firm's average total assets. Firm B has net income of $74,000, asset turnover of 1.20, and average total assets of $900,000. Calculate the firm's sales, margin, and ROI. Firm C has net income of $136,000, asset turnover of 2.01, and ROI of 23.80%. Calculate the firm's margin, sales, and average total assets