Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others. 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: (Loss amounts should be indicated by a minus sign.) Case #1 Case #2 Case #3 Case #4 Sales $ 452,000 $ 205,000 $ 306,000 Variable expenses 137,350 94,860 Fixed expenses 67,000 467,000 Net operating income (loss) $ 76,360 $ 66,610 $ (21,860) Contribution margin ratio (percent) 43 % 77 % %