Required: a. Assume that only one product is being sold in each of the four following case situations: b. Assume that more than one product is being sold in each of the four following case situations: Complete this question by entering your answers in the tabs below. 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 $ 449,000 EA $ 69,580 42% Case #2 Case #3 Case #4 206,000 $ 290,000 133,900 89,900 61,000 465,000 $ 107,360 $ (15,900) % 82% % Required A Required B