The formulas below are the cost and revenue functions for a company that manufactures and sells small radios. C(x) = 80,000+ 31x and R(x) = 36x a. Use the formulas shown to write the company's profit function, P. from producing and selling x radios b. Find the company's profit if 18.000 radios are produced and sold. a. The company's profit function is P(x) = (Simplify your answer.)