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 indicatec a minus sign.) Case #1 Case #2 Case #3 Case #4 Unit sold 8,400 19,800 5,900 Sales 277,200 $ 352,500 $ 194,700 Variable expenses 109,200 198,000 Fixed expenses 88,000 178,000 91,000 Net operating income (loss) $ Contribution margin per unit $ (22,900) $ 11 $ 170,400 $ 3,400 13 Requimd A Required B >