Answer: $116.67
Explanation:
Given: The registration fee fee health club = $50
The monthly fee = $25
Therefore, the total amount spent on heath club in a year (12 months) is given by :

If Willie visits the club 3 times a week for a year, then cost of each workout =

Hence, if Willie visits the club 3 times a week for a year, then each workout cost him $116.67.