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: Unit sold Sales Variable expenses Fixed expenses Operating income (loss) Contribution margin per unit Case #1 Case #2 Case #3 Case #4 10.000 10.000 5.000 $ 200 000 5 110,000 S 320,000 140.000 50,000 48,000 32,000 100,000 S 22,000 $ 5,000 s (25,000) $ 20 $ 13 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 (loss) Average contribution margin (percentage) Case #1 Case #2 $ 400,000 $ 420.000 252.000 125.000 $ 6,200 15% Case #3 Case #4 $ 500,000 400,000 110,000 $ 21,000 $ (4.800) 50%