A company manufactures x HDTVs per month. The monthly marginal profit (in dollars) is given by: P'(x)=165-0.1x 0<x<4,000

A) The company is currently manufacturing 1500 HDTVs per month, but is planning to increase production. Find the change in monthly profit if monthly production is increased to 1600 HDTVs.

B) Explain what would happen to the company's profit (using the marginal profit function) if they were to manufacture more than 1650 HDTV's per month.

C) If you wanted to know the marginal profit from manufacturing 8000 HDTVs per month, would the about function be useful to you? Explain.