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 17,100 4,400 11,400 6,840 $ 205,200 $ 114,000 $ 342,000 136,800 79,800 57,000 36,480 114,000 $ 9,120 $ 13,680 $ (11,400) (A $ 10 69 $ 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.) Case #1 Case #2 Case #3 Case #4 Sales $ 514,000 $ 414,000 $ 260,000 $ 614,000 Variable expenses 269,100 429,800 Fixed expenses 103,500 134,200 Operating income (loss) $ 7,700 $ 24,200 $ (4,000) Average contribution margin (percentage) 20% 60%