Suppose the demand for a product is given by P = 40 - 4Q. Also, the supply is given by P = 10 + Q. If a $10 per-unit excise tax is lecied on the buyers of a good, then after the tax buyers will pay ______________ for each unit of the good.
A) $4
B) $6
C) $16
D) $24
E) None of these