Answer: $217.50
Let's break this down to simplify how we get our answer
first we know that 15 students cost $135.00
But there are 26 students in total and each additional student cost $7.50
26-15=11 additional students
Now let's take the 11 additional students and multiply it by 7.50
11 x 7.50 = 82.5
Now we must add 135.00 and 82.50
135.00+82.50=$217.50
