Presented here is the income statement for Big Sky Incorporated for the month of February: Sales $ 60,500 Cost of goods sold 52,100 Gross profit $ 8,400 Operating expenses 14,700 Operating loss $ (6,300) Based on an analysis of cost behavior patterns, it has been determined that the company's contribution margin ratio is 16%. 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 (or loss)? c. Calculate the amount of revenue required for Big Sky to break even