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 8,200 $ 221,400$298,200 139,400 81,000 20,900 5,200 $150,800 229,900 178,000 73,000 $ (92,800)$101,100(21,000) 6