Fill in the missing amounts in each of the eight cases 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: 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 $ 442,000 $ 197,000 $ 299,000 Variable expenses Fixed expenses Net operating income (loss) $ 48,120 Contribution margin ratio (percent) 36 % 135,930 83,720 62,000 469,000 $ 90,710 $ (5,720) % 81% %