Berha's Cellular sells phones for $$100.$ The unit variable cost per phone is $$50$ plus a selling commission of $10\%.$ Fixed manufacturing costs total $$1,250$ per month, while fixed selling and administrative costs total $$2,500.$ Berha's expects sales of $$11,000$ during next year. How much is the margin of safety estimated for next year.

Select one:

a$.$ $$1,625$

b$.$ $$3,500$

c$.$ $$2,667$

d$.$ $$4,750$