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: Case #2 Case 3 20.000 Case 1 20.000 s 160.000 80.000 60 000 Case 4 4,000 $ 320 000 Unit sold Sales Variable expenses Fixed expenses Operating income (loss) Contribution margin per unit 120,300 50.000 S 36.000 24,000 s 205 145,000 S 120.000 (56.000) $ 14 b. Assume that more than one product is being sold in each of the following four case situations: (Enter "Contribution margin ratio" in percent. Round your final answers to the nearest whole dollar amount.) Sales Variable expenses Fixed expenses Operating income (los) Average contribution margin (percentage) Case #1 Case #2 $ 450 000 $ 400 000 259,500 145.000 S 7. 200 30% Case 3 Case 4 S 500.000 440.000 100.000 $ 22 000 $ (4000) 50%