Required: Assume that only one product is being sold in each of the four following case situations: Case #1 Case #2 Case #3 Case #4 Unit sold Sales Variable expenses Fixed expenses Net operating income (loss) Contribution margin per unit 8,400 19,500 5,300 $218,400$ 310,200 $ 164,300 117,600 82,000 $ 18,800 214,500 168,000 74,000 $ (41,100)$113,000 200 10