Final answer:
Steven can save $80 a month if he stops drum lessons with Mr Stoll.
Step-by-step explanation:
Steven can save $80 a month if he stops drum lessons with Mr Stoll. This means that Steven was paying $80 a month for drum lessons. In order to calculate what he can give Mr Stoll as a parting gift, we need more information about the cost of the drum lessons or any other factors that could affect the amount of the gift.