15 6 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: points Unit sold Sales eBook Variable expenses Fixed expenses Operating income (loss) Contribution margin per unit Case #1 Case #2 19,200 Case #3 12,800 Case #4 7,680 $384,000 89,600 40,960 128,000 $ 230,400 $128,000 153,600 64,000 $ 10,240 $ 15,360 $ (12,800) 10 $ $ 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 $ 528,000 $428,000 278,200 107,000 $ 8,400 20% Case #3 Case #4 $628,000 439,600 138,400 $ 28,400 $ (4.000) 60%