Brief Exercise 7-32 Margin of Safety Chillmax Company plans to sell 3,500 pairs of shoes at $60 each in the coming year. Unit vari- able 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 sell- ing and administrative expense). Break-even units equal 2,000. Required: 1. Calculate the margin of safety in terms of the number of units. 2. Calculate the margin of safety in terms of sales revenue