A karate studio charges ^$35ᶠor the first course and ^$22.50ᶠor each course after that, even if the student leaves the course early.
A) If a student takes only the first course, how much does it cost?
B) If a student takes two courses, how much does it cost?
C) If a student takes three courses, how much does it cost?
D) If a student takes four courses, how much does it cost?