Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others. Required: a. Assume that only one product is being sold in each of the four following case situations: b. Assume that more than one product is being sold in each of the four following case situations: Complete this question by entering your answers in the tabs below. Required A Required B Assume that only one product is being sold in each of the four following case situations: (Loss amounts should be indicated by a minus sign.) Units sold Sales Variable expenses Case 1 Case 2 Case 3 Case 4 9,600 14,600 20,300 5,600 $ 249,600 $ 331,200 $ 190,400 182,400 243,600 Contribution margin Fixed expenses 86,000 178,000 80,000 Net operating income (loss) $ (19,600) $ 168,600 $ 9,600 Contribution margin per unit $ 19 $ 11 $ 12