The following monthly data are available for Lumberyard Company. which produces only one product: Selling price per unit, $42; Unit variable expenses, $14; Total fixed expenses, $84,000; Actual sales for the month of June, 4,000 units. How much is the margin of safety for the company for June?

a. $84,000

b. $42,000

c. $126,000

d. $1,000

how did we solve it and get the answer ?