Kay has an etail poster business. Suppose Kay expects to sell 1,000 posters. Her average sales price

Question:

Kay has an etail poster business. Suppose Kay expects to sell 1,000 posters. Her average sales price per poster is $30 and her average cost per poster is $24. Her fixed expenses total $3,600. Compute her margin of safety
a. in units (posters).
b. in sales dollars.
c. as a percentage of expected sales.