3. David is a salesman for a local Ford dealership. He is paid a percent of the profit the dealership makes on each car. If the profit is under $800, the commission is 25%. If the profit is at least $800 and less than $1,000, the

commission rate is 27.5% of the profit. If the profit is $1,000 or more, the rate is 30% of the profit. Find the

difference between the commission paid if David sells a car for a $1,000 profit and the commission paid if he

sells a car for a $799 profit?

.25x,

p(x) = 3.275x,

x < $800

$800 < x < $1000

x $1000

.30x,