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 Sales $ 447,000 $ 200,000 Variable expenses 138,000 Case #3 Case #4 $ 298,000 98,340 Fixed expenses 57,000 472,000 Net operating income (loss) $ 80,680 $ 77,120 $ (24,340) Contribution margin ratio (percent) 44 % % 78 % %