text: compute return on assets? 15% on sales of $20,000,000; debt of $7,500,000; total assets of $22,500,000; after tax interest cost on total debt of 5%; what is the return on assets i get 12% (or .12:1)  gross income $3,000,000 (15% on $20,000,000) - interest cost $375,000 (5% of $7,500,000) = net income $2,625,000 divide into $22,500,000