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: Case #1 Case #2 Case #3 Case #4 Unit sold 9,000 20,300 4,800 Sales $ 315,000 $ 347,500 $ 124,800 203,000 144,000 92,000 164,000 84,000 Variable expenses Fixed expenses Net operating income (loss) Contribution margin per unit $ 16,700 $ 147,300 $ (40,800) $ 13 $ 11 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 $ 444,000 $ $ 296,000 Sales Variable expenses 196,000 121,520 53,000 85,840 472,000 Fixed expenses Net operating income (loss) Contribution margin ratio (percent) $ $ 123,560 $ (5,840) 44,400 35% 84%