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Problem 12.23 Prepare a contribution margin format income statement; calculate break-even point Presented here is the income state LO 7, 8, 9, 11 Based on an analysis of cost behavior patterns, it has been determined that the company's contribution margin ratio is 20%. Required: a. Rearrange the preceding income statement to the contribution margin format. b. If sales increase by 30%, what will be the firm's operating income? c. Calculate the amount of revenue required for Big Shot to break even