Problem 12.23 Prepare a contribution margin format income statement; calculate breakLo 7,8,9,11 even point Presented here is the income statement for Big Shot Inc. for the month of May: 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