<human>:  A truck driver has to spend $2 per gallon of gas. She can drive 10 miles per gallon. She drives at a rate of 30 miles per hour. If she is paid $.50 per mile, how much money does she make if she drives for 10 hours?
<bot>: How many miles does the truck driver drive? ** The truck driver drives for 10 hours at 30 miles per hour, so she drives 10*30=<<10*30=300>>300 miles.
How many gallons of gas does the truck driver need? ** Therefore, she needs 300/10=<<300/10=30>>30 gallons of gas.
How much will the gas cost? ** This will cost her 30*$2=$<<30*2=60>>60.
How much money will the truck driver make? ** She will make 300*$.50= $<<300*.50=150>>150.
How much money will the truck driver make after paying for gas? ** Thus, after paying for gas, she will make $150-$60=$<<150-60=90>>90.
#### 90