help answering super easy questions ( $1 bids only)

This is one of the questions , but I have more questions as well

The polynomial function P(x)
=
35x −50,000

models the relationship between the number of computer briefcases
x that a company sells and the profit the company makes, P(x).
Find

P(4000
),

the profit from selling

4000

computer

briefcases.

P(4000)=$
nothing