Using Apple's most recent 10-k form, give a brief explanation of each ratio, how it is used in business performance evaluation. Compute each of following ratios for the most recent year and the previous year. Assume all sales are credit sales. Round all ratios to two decimal places.

1. Current ratio
2. Cash ratio
3. Inventory turnover
4. Accounts receivable turnover
5. Gross profit percentage
6. Debt ratio
7. Debt to equity ratio
8. Profit margin ratio
9. Asset turnover ratio
10. Rate of return on common stockholders' equity
11. Earnings per share
12. Price/earnings ratio
13. Dividend yield
14. Dividend payout