Bramble Corp. recorded operating data for its shoe division for the year. Sales Contribution margin $730000 320000 Total fixed costs 90000 Average total operating 500000 assets Ques Multip Ques Multipl Ques Multipl Quest 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? Multiple 44% 12% 56% 46% Quest Multiples Quest Multiple Quest