Here is the relevant quote from Apple’s CFO Peter Oppenheimer, made during one of Apple’s quarterly conference calls: “Regarding the App Store and the iTunes stores, we are running those a bit over break even and that hasn’t changed.”

This is by now an old quote (from January 2010 – how time runs) so things might have changed. There just isn’t any more current information. Nevertheless, if you look at Apple’s numbers it’s pretty obvious that they make the vast majority of their money by selling hardware. Music, videos and apps make the hardware more attractive, not a lot of money for Apple.