For each of the following independent cases, the minimum desired (ROI) Return on Investment is 20%. Compute for the missing items.

For each of the following independent cases, the minimum desired (ROI) Return on Investment is 20%. Compute for the missing items. A B C Sales $400,000 ? $700,000 Operating Income ? ? $42,000 Operating Assets ? $300,000 ? Profit Margin 15% 8% ? Turnover ? 3 times ? Return on 30% ? ? Investment Residual Income ? ? $22,000