Cash Register Land (3/29)

I was standing in line at a bookstore and watched the customer in front of me buying a book. I didn't see how much the book cost, nor did I see how much the customer paid the cashier. I did see that the customer forked over a single bill of some unseeable amount. Then the customer said, "That's the last bit of cash I have on me. I hope to see some of it again." I heard the following sounds "clunk," "shick," and "cling," indicating that the bill had been taken and that a single bill and single coin had been given in return. The customer looked at his change and said, "Oh, good. Enough for another copy and a phone call."

How much was the book?


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