Answer:
$70
Explanation:
First you have to know how much the pants and T shirts cost. So for the T shirts since they are 15 dollars each and he wants 4 do 15 times 4 which is 50 dollars. Then for the pants since they are 15 dollars each and he wants 3 that is 45 dollars. Add them both together and you get 105 dollars. Then get the amount of money he has and subtract that by the cost of all of it, which is $70.
I hope I helped you :)