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 following four case situations: Unit sold Sales Variable expenses Fixed expenses Operating income (loss) Contribution margin per unit Case #1 Case #2 Case #3 O Case #4 16,200 4,320 10,800 6,480 S 194,400 $ 108,000 $ 216,000 $ 324,000 129,600 64,800 75,600 54,000 34,560 127,440 108,000 $ 10,800 $ 8,640 $ 12,960 $ (10,800) S 4 $ 10 $ 13