The following information is available for a company's cost of sales over the last five months. Month January February March April Units sold 420 820 1,700 2,500 Cost of sales $31,800 $38,000 $50,000 $62,000 Using the high-low method, the estimated variable cost of sales per unit sold is: Multiple Choice $24.80. $75.71. $32.12. $14.52. $29.41. Henderson Co. has fixed costs of $33,000 and a contribution margin ratio of 25%. If expected sales are $176,000, what is the margin of safety as a percent of sales? Multiple Choice 33%. 75%. 5%. 25%. 50%