Objective 5 Example 7.10 Chillmax Company plans to sell 3,500 pairs of shoes at $60 each 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. Required: Calculate the degree of operating leverage. (Note: Round answer to the nearest tenth.)