A print shop makes bumper stickers for election campaigns. If x stickers are ordered (where x < 10,000), then the price per sticker is
0.28 − 0.000002x
dollars, and the total cost of producing the order is
0.087x − 0.0000005x2
dollars.

Use the fact that
profit = revenue − cost
to express P(x), the profit on an order of x stickers, as a difference of two functions of x.