Measure Up manufactures rules, which sells for exist2.50 per unit. Management recently finished analyzing the results of the company's operations for the current month. At a break-even point of 30,000 units, the company's total variable costs are exist60,000 and its total fixed costs amount to exist40,000. a. Calculate the contribution margin per unit b. Calculate the company's margin of safety if monthly sales total 40,000 units. c. Estimate the company's monthly operating loss if it sells only 28,000 units. d. Compute the total cost per unit at a production level of (1) 30,000 pens month and (2) 40,000 rulers per month. Explain the reason for the change in unit costs