Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others. (Hint: One way to find the missing amounts would be to prepare a contribution format income statement for each case, enter the known data, and then compute the missing items.) 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: (For all requirements, Loss amounts should be indicated by a minus sign.) 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: Case #1 Case #2 Case #3 Case #4 Sales $ 453,000 S 198,000 306,000 Variable expenses 126. 720 7 6500 Fixed expenses 67,000 470,000 Net operating income (loss) $ 61,200 $ 4,280 112,120 S 9,500 Contribution margin ratio (percent) 40% 36 % 84