Neville recounts an everyday errand run — the bank, a bookstore, and a couple of shops on Beverly — after which he found an unexplained extra twenty dollars in his pocket. Certain his wife had not given it to him and unable to account for it from his small purchases, he suspected a bank teller's error and went back to sort it out. A bank employee later called to confirm the money had in fact been miscounted on their end when it went through the IBM machine.