Here's how to make math fun:

You were camping on the beach when your friends arrived with a 24-pack of Schmidt beer, which they purchased for $12. Since they didn't want to be caught with the beer after the lady up the road called the cops, they decided to drink some before leaving. They drank 8 beers between the two of them. How much do you owe your friends for the beer, considering they paid $12 for the 24-pack?