A company manufacturers and sellsxelectric drills per month. The monthly cost and price-demand equations are

C(x)=63000 + 40x

p=220 - x/30

0<=x<=5000

Find the production level that results in the maximum revenue.

Production level=?

Find the price that the company should charge for each drill in order to maximize profit.

Price=?

Suppose that a 5 dollar per drill tax is imposed. Determine the number of drills that should be produced and sold in order to maximize profit under these new circumstances.

Number of drills=?