Chapter 8: Profitability Class Exercises Q1- Consecutive five-year balance sheets and income statements of Mary Lou Szabo Corporation are as follows: a- Compute the following for the years ended December 31, 2003-2007: 1. Net profit margin 2. Total asset turnover 3. Return on assets 4. DuPont return on assets 5. Operating income margin 6. Operating asset turnover 7. Return on operating assets 8. DuPont return on operating assets 9. Sales to fixed assets 10. Return on investment 11. Return on total equity 12. Return on common equity 13. Gross profit margin