Assume a local Cost Cutters provides cuts, perms, and hairstyling services. Annual fixed costs are $120,000, and variable costs are 40 percent of sales revenue. Last year's revenues totaled $250,000.

a) Determine its break-even point in sales dollars.

b) Determine last year's margin of safety in sales dollars.

c) Determine the sales volume required for an annual profit of $80,000.