It pays to be honest. I decided to call the fabric store and talk to the manager/asst manager and told her what had happened this afternoon. She said that the next time I come in, they'll give me 15% off my purchase and she was so greatful that I told her I'd mail her the signed copy of my credit card receipt. I do feel good about the whole thing, and knew I'd feel guilty if I would have not said anything. She said she'd talk to the girl and apologized for the problem.