You own a beauty salon where you not only cut hair but you also sell hair products. You buy a dozen barrettes for $18.00 and then sell them in your store for $2.00. You want to calculate your mark-up.

To do so, you multiply 2 by 12, subtract 18 and then divide by 12. Is this correct?

A) Yes.
B) No; you should divide 18 by 12 and then divide by 2.
C) No; you should divide 18 by 12, divide by 2 and multiply by 100.
D) No; you should multiply 2 by 12, subtract 18 and then divide by 18.