Prepare a contribution margin format income statement; calculate breakeven point Presented here is the income statement for Big Sky Inc. for the month of February: Based on an analysis of cost behavior patterns, it has been determined that the company's contribution margin ratio is 25%. Required: a. Rearrange the preceding income statement to the contribution margin format. b. If sales increase by 10%, what will be the firm's operating income? c. Calculate the amount of revenue required for Big Sky to break even