fwiw, it made me remember the Seinfeld episode about Kramer’s scheme to take returnables from New York to Michigan. Buy ‘em for a nickel, sell ‘em for a dime. It was the quote that threw me off.
The first part is later in the episode where they’re singing in the mail truck.
The second part is earlier in the episode when Newman informs Kramer that he’s signed up for an extra mail truck making the Michigan run.