Answer:
$493
Explanation:
First you would fid the amount of money he made with 40 hours which is $340
then you would double 8.50 which is 17
then multiply 17 by 9 to get $153
finally you would add $340 and $153 to get $493
AJajijawfjapwfoawfj got it right first I just didn't want to mess anyone up with the answer that I had before which was wrong.