Solve the Problem $C ( x )$ To Produce $x$ Units of Plywood Is Given By

Multiple Choice

Solve the problem.
-If the average cost per unit $C ( x )$ to produce $x$ units of plywood is given by $C ( x ) = \frac { 300 } { x + 10 }$ , what is the unit cost for 20 units?

A) $\$ 10.00$
B) $\$ 5.00$
C) $\$ 15.00$
D) $\$ 1.50$