Required A Required B Assume that more than one product is being sold in each of the four following case situations: Note: Loss amounts should be indicated by a minus sign. Sales Variable expenses Fixed expenses Net operating income (loss) Contribution margin ratio (percent) Case 1 Case 2 $ 446,000 $ 210,000 249,760 114,000 140,700 Case 3 Case 4 $ 308,000 101,640 69,000 468,000 $ 82,240 $ 300 $ 75,660 $ (16,640) 44 % 33 % 78 % % < Required A Required B >