Sure.
So this is basically what I want to happen:
Students will purchase a package such as 50 tokens, 100 tokens, 200 tokens, etc. A token is equivalent to one hour of live online class time. The student then uses the Scheduler plugin to book a class. For each class booked by the student, they will have one token subtracted from their total tokens. If a student has 0 tokens in their possession, they will be unable to book a class within the Scheduler plugin.
I think I have most of the details figured out. I just need to figure out how I can set up some sort of token system. They don't have to be called tokens. You could think of them as lessons or class sessions. I just need a way to allow students to purchase time, and each time they book a class, that time is subtracted by 1 hour. Also, the number needs to be visible to the student.