Continuity mistake: Barbara talks about how good being a waitress is and throws a bunch of dollar bills on top of a book. In the following angle, they have moved closer to the pencil cube.
Audio problem: The auctioneer says the object that Oliver is bidding on is Japanese, but the insert angle of the brochure said it was Chinese. It could be a character mistake, but that wouldn't move the plot anywhere and, besides, this is a movie, so the one who designed the brochure most probably didn't know what the script said.
