Snake: Otacon!
Otacon: What is it, Snake?
Snake: I lost a peanut under the sofa. When I went to retrieve the peanut all I found was this 20 dollar bill.
Otacon: Oh! Well don’t worry Snake. 20 dollars can be used to buy lots of peanuts!
Snake: Hnnn. Explain how.
Otacon: Money can be exchanged for goods and services! Like people driving you places, or giving you food!
Snake: So… you’re saying that if I take this 20 dollars to a place that sells peanuts. I can get MORE peanuts?
Otacon: Basically!
Snake: Hrrnn… I might have to try this sometime.