Presented here is the income statement for Big Sky Incorporated for the month of February Sales Cost of goods sold Gross profit Operating expenses Operating loss $ 61,500 51,300 $ 10,200 15,000 5 (4,000) Based on an analysis of cost behavior patterns, it has been determined that the company's contribution margin ratio is 17% Required: a. Rearrange the preceding income statement to the contribution margin format b. If sales increase by 15%, what will be the firm's operating income (or loss)? c. Calculate the amount of revenue required for Big Sky to break even