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.)

a. Assume that only one product is being sold in each of the following four case situations: Case #2 Case #3 Case #4 Case #1 10,000 Unit sold 10,000 10.000 Sales $ 140,000 $ 105,000 $ 260,000 Variable expenses 50.000 80,000 36,000 34,000 Fixed expenses Operating income (loss) Contribution margin per unit 160,000 (10,000) $ 13,000 $ 20,000 $ $ 10 $ 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.) Case #1 Case #2 Case #3 Case #4 Sales $ 400,000 $ 440,000 $ 600,000 Variable expenses 300,000 272,800 115,000 Fixed expenses 140,000 S 7,600 $ 19,000 $ (4,600) Operating income (loss) Average contribution margin (percentage) 30% 53%