Solve the Problem $x$ Thousand Compact Disc Players Is $P(x)=x^{3}-5 x^{2}+3 x+8$

Multiple Choice

Solve the problem.
-The profit in dollars from the sale of $x$ thousand compact disc players is $P(x) =x^{3}-5 x^{2}+3 x+8$ . Find the marginal profit when the value of $x$ is 6 .

A) $\$ 51$
B) $\$ 59$
C) $\$ 98$
D) $\$ 90$