Let R(x), C(x), and P(x) be, respectively, the revenue, cost, and profit, in dollars, from the production and sale of x items. If R(x)=8x and C(x)=0.004x + 2.5x + 50, find each of the following. a) P(x) b) R(150), C(150), and P(150) c) F(x), C'(x), and P'(x) d) R'(150), C'(150), and P'(150) a) P(x)= | (Use integers or decimals for any numbers in the expression.) b) R(150)=$ (Type an integer or a decimal.) C(150)=$ (Type an integer or a decimal.) P(150)=$ (Type an integer or a decimal.) c) R'(x)= C'(x) = (Type an integer or a decimal.)