Solve the Problem $$R(x)=78 x-2 x^{2} ; C(x)=22 x+105$$ A) $\$ 392$

Multiple Choice

Solve the problem.
-Given the following revenue and cost functions, find the maximum profit. (Recall that profit equals revenue minus cost.)
$$R(x) =78 x-2 x^{2} ; C(x) =22 x+105$$

A) $\$ 392$
B) $\$ 497$
C) $\$ 679$
D) $\$ 287$