The truck driver drives for 10 hours at 30 miles per hour, so she drives 10*30=<<10*30=300>>300 miles.
Therefore, she needs 300/10=<<300/10=30>>30 gallons of gas.
This will cost her 30*$2=$<<30*2=60>>60.
She will make 300*$.50= $<<300*.50=150>>150.
Thus, after paying for gas, she will make $150-$60=$<<150-60=90>>90.
#### 90