38. Grady Home Health has a profit margin of 15 percent on sales of $20,000,000. If the firm has debt of $7,500,000 and total assets of $22,500,000, what is Grady's return on assets (ROA)? a. 13.3% b. 10.9% c. 8.0% d. 5.3% e. 3.1%