The trivia item below may give away important plot points.
At the end, Rebecca pays off her entire debt in coins, stating that she was doing it in the most inconvenient way possible. In real life, Mr. Smeath could have refused to accept it. While coins are legal tender within the Federal Reserve System, no law requires a merchant or anyone else to accept them. Legally, however, the debt would be considered paid off if he'd refused her payment.