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 10,000 19,100 5,900 S Sales $ 300,000 $ 337,500 $ 200,600 Variable expenses 160,000 152,800 Fixed expenses 95,000 172,000 74,000 Net operating income (loss) $ 17,000 $ 140,200 $ 14,500 Contribution margin per unit $ 14 $ 12