The Green Division of Frizell Company reported the following data for the current year . Top management is unhappy with the investment center's return on investment (ROI). it asks the manager of the Green Division to submit plans to improve ROI in the next year . The manager believes it is feasible to consider the following independent courses of action. Increase sales by $328,000 with no change in the contribution margin percentage. Reduce variable costs by $104,600. Reduce average operating assets by 4%. Compute the return on investment (ROI) for the current year . (Round answer to 1 decimal place, i. e. 9.5.) Using the ROI formula, compute the ROI under each of the proposed courses of act ion. (Round computations for contribution margin percentage to 0 decimal places, i.e. 25 and final answers to one decimal place, i.e. 15.5.)