Mark Works Forty Hours a Week at a Clothing Store

Multiple Choice

Mark works forty hours a week at a clothing store. His weekly salary is $220, plus he receives a 5% commission on sales over $1,000. Given the functions f ( x ) = 0.05 x and g ( x ) = x - 1,000, which of two compositions, ( f o g ) ( x ) or ( g o f ) ( x ) , represents Mark's commission?

A) ( f o g ) ( x )
B) ( g o f ) ( x )