Please help correct the errors in part A, and help me solve the highlighted boxes in part B.

*This is all of the information that is provided.*

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 four following case situations: Answer is complete but not entirely correct Case #4 Case #1 Case #2 Case #3 13,600 8,000 20,700 4,500 Unit sold 272,000 S 326,400 413,600 X 144,000 Sales 144,000 163,200 248,400 76,500 Variable expenses 165,600X 85,000 162,000 88,000 Fixed expenses S 1,200 S 40,000 (17,500) Net operating income (loss) 75,600 8 16 12 Contribution margin per unit 15