Sunland Company recorded operating data for its shoe division for the year. Sales $700000 300000 90000 Contribution margin Total fixed costs Average total operating assets 500000 How much is ROI for the year if management is able to identify a way to improve the contribution margin by $50000, assuming fixed costs are held constant? O 13% O 52% O 43% 0 42% Save for Later Attempts: 0 of 1 used Submit