Answer:
$2.50
Explanation:
All we need to do to solve this is find out how much 5 regular tickets will cost.
We know they cost 3.50 each so:
5 x 3.50 = 17.50
Now all we do is subtract the 15.00 the book would cost to find the "remainder" AKA what you save.
17.50 - 15.00 = 2.50
$2.50 is your answer.
Hope this helps and have a nice day!