Solve the Problem $\begin{array} { l } R ( x ) = 30 x - 0.5 x ^ { 2 } \\C ( x ) = 2 x + 8\end{array}$

Multiple Choice

Solve the problem.
-Find the number of units that must be produced and sold in order to yield the maximum profit, given the follow equations for revenue and cost:
$\begin{array} { l } R ( x ) = 30 x - 0.5 x ^ { 2 } \\C ( x ) = 2 x + 8\end{array}$

A) 28 units
B) 32 units
C) 36 units
D) 29 units