Solve
-Business People Are Concerned with Cost Functions, Revenue Functions $R ( x )$

Solve.
-Business people are concerned with cost functions, revenue functions, and profit functions. Suppose the revenue $R ( x )$ for $x$ units of a product can be described by $R ( x ) = 400 x$ , and the cost $C ( x )$ can be described by $C ( x ) = 2200 + 180 x$ . Find the profit $P ( x )$ for $x$ units.

A) $\mathrm { P } ( \mathrm { x } ) = 220 \mathrm { x } - 2200$
B) $P ( x ) = \frac { 220 } { x } - 2200$
C) $\mathrm { P } ( \mathrm { x } ) = 580 \mathrm { x } - 2200$
D) $\mathrm { P } ( \mathrm { x } ) = 220 \mathrm { x } + 2200$