Stan's dad wants him to learn the importance of saving money. He takes Stan to Southpark Bank to deposit the money into an account so it can grow. Unfortunately, the banker loses his money and other customers' money almost instantly. This clip can be a funny introduction to personal finance and banking.

Mr. Johnson from the Bank of Central Victoria talks to students about the importance of saving for key expenses and retirement. He writes out the compound interest formula to explain why they would have $727,000 in 25 years if they save 50 cents per week with the bank and the interest doubles their investment every 3 years.

Homer withdraws his life savings from his bank account and invests it in 500 shares of Animotion, Inc. His hope is that he'll get rich when the share price skyrockets. The stock makes steady gains but then plummets, and Homer is upset.

The song shows how the money you deposit in a bank earns interest or the money you borrow gains interest.

Fifty-three years ago, Jerry's Uncle Leo stiffed Jerry's mother out of $50. Eager to get it back, Jerry's father says, "Do you know what that's worth today in interest alone? $663.45, figured at a conservative 5% interest, compounded quarterly." Morty's calculations are almost accurate, though he does not compound quarterly, and his sum includes the principle, not just the interest.