We're a bookstore Sir

Customer: Do you sell CD cases?
Me: No, sorry sir we don't. You could try Grand and Toy.
Customer: Do you sell little animal figures?
Me: Ummm.... no.
Customer: Do you have oil paints?
Me: No. We have books about oil painting, like how to paint that kind of thing...
Customer: What kind of store is this?
Me: Ummm We're a BOOKstore sir. We mostly sell books.


I'm not sure which of us was more confused here.