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 Case #4 16,800 11,200 6,720 201,600 $ 112,000 $ 336,000 134,400 78,400 56,000 35,840 112,000 $ $ 8,960 $ 10 13,440 $ (11,200) 13 b. Assume that more than one product is being sold in each of the following four case situations: (Enter "Contribution margin ratio" in percent. Round your final answers to the nearest whole dollar amount.) Sales Variable expenses Fixed expenses Operating income (loss) Average contribution margin (percentage) Case #1 Case #2 Case #3 Case #4 $ 512,000 $ 412,000 $ 267,800 612,000 428,400 103,000 133,600 7,600 $ 23,600 (4,600) 20% 60%