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 19,200 13.226 12,800 7,680 S 230,400 $ 128,000 $ 486,400 $ 384,000 153,600 89,600 64,000 40,960 128,000 $ 10,240 $ 15,360 $ (12,800) $ 10 $ 13