need help, the yellow boxes are what need to be filled in.

Net Income Assets Net Income Net Sales Net Sales Total Assets Return on Assets = For the corporations listed below, calculate the return on assets for the missing years. Record your answers in the space provided. (000's) 1/31/13 1/31/12 1/31/11 Wal-Mart Profit Margin Asset Turnover Return on Assets 3.62% 2.31 8.37% 3.68% 2.31 3.78% 2.33 8.83% 12/31/12 12/31/11 12/31/10 Harley Davidson Profit Margin Asset Turnover Return on Assets 11.18% 0.61 6.80% 11.28% 0.55 6.19% 3.02% 0.52 12/31/12 12/31/11 12/31/10 PPL Corporation Profit Margin Asset Turnover Return on Assets 12.42% 0.28 3.50% 11.74% 0.30 11.01% 0.26 2.86% 9/28/13 9/28/12 9/28/11 Apple Profit Margin Asset Turnover Return on Assets 21.67% 0.83 17.89% 26.67% 0.89 23.70% 23.95% 0.93 22.28% - Apple's return on assets is roughly five times greater than PP&L's return on assets. Does this mean that Apple is a better investment