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 9,300 21,000 4,400 $ 241,800 $ 288,200 $ 127,600 Variable expenses 176,700 189,000 Fixed expenses 87,000 173,000 75,000 Net operating income (loss) $ 10,400 $ 176,000 $ (35,400) Contribution margin per unit $ 14 $ 12 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 $ 458,000 $ 209,000 $ 294,000 Variable expenses 131,670 99,960 Fixed expenses 54,000 Net operating income (loss) $ 78,360 $ 475,000 101,460 $ (26,960) Contribution margin ratio 42% 82% (percent)