1 pts Naples, Inc. recorded operating data for its shoe division for the year. Sales $750,000 Contribution margin 145,000 Controllable fixed costs 90,000 Average total operating assets 300,000 How much is ROI for the year if management is able to identify a way to improve the contribution margin by $30,000, assuming fixed costs are held constant? 25% 28% 31% 12% Question 12 SOS PREMIUM SOUND