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 Sales 8,500 20,000 4,800 $ 238,000 $ 340,600 $ 124,800 Variable expenses 110,500 220,000 Fixed expenses 93,000 179,000 85,000 Net operating income (loss) Contribution margin per unit $ $ 56,800 $ 18 $ 145,000 $ 11 (41,800) 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 $ 448,000 $ 191,000 $ 290,000 Variable expenses 118,420 98,600 Fixed expenses 68,000 466,000 Net operating income (loss) $ 57,720 $ 111,280 $ (39,600) Contribution margin ratio (percent) 39% 82%