Brief Exercise 7-34 Impact of Increased Sales on Operating Income Using the Degree of Operating Leverage Chillmax Company had planned to sell 3,500 pairs of shoes at $60 cach in the coming year. Unit variable cost is $21 (includes direct materials, direct labor, variable factory overhead, and variable selling expense). Total fixed cost equals $78,000 (includes fixed factory overhead and fixed selling and administrative expense). Operating income at 3,500 units sold is $58,500. The degree of operating leverage is 2.3. Now Chillmax expects to increase sales by 10% next year. Required: Calculate the percent change in operating income expected 1. 2. Calculate the operating income expected next year using the percent change in operating income calculated in Requirement 1