E10-21A (similar to): sales margin, capital turnover, ROI, RI Results from Optimum Corporation's most recent year of operations is presented in the following table. Operating income .......... $8,800 Total assets ............ $16,000 Current liabilities .... $4,100 | Sales.. ................. $35,200 Target rate of return.... 14% Requirements: 1. Calculate the sales margin, capital turnover, and return on investment (ROI). 2. Calculate the residual income (RI)