Okay so don't yell at me for sounding stupid, but my dim sense of how prices work is that they eventually reach a point low enough to balance profit with getting people to even buy your stuff. They can't be too low because there needs to be a profit, but they can't be too high because other sellers will undersell them. So why are some things so overpriced, like soda and movie theater popcorn? I'm primarily interested in soda because it is my lifeblood.