Automatically your going to spend $43.00 just on tickets with the $3.00 service fee. So 6x5=30. The 6 equals 6 bags of popcorn and 5 equals the cost of the bags of popcorn. if you add 30 and $43.00 you get $73.00 With 2 dollars left to spends. So the max number of bags of popcorn he can buy is 6 bags!