May I get some help

A particular computing company finds that its weekly profit, in dollars, from the production and sale of x laptop computers is P(x) = - 0.006x" -0.1x +500x-700. Currently the company builds and sells 9 laptops weekly a) What is the current weekly profit? ) How much profit would be lost if production and sales dropped to 8 laptops weekly? c) What is the marginal profit when x = 9? d) Use the answer from part (a) and (c) to estimate the profit resulting from the production and sale of 10 laptops weekly. a) The current weekly profit is $ (Round to the nearest cent as needed.)