It's very hard to compare sales figures with fly-away costs as they measure completely different things. Sales figures usually include many extras like weapons,

It's very hard to compare sales figures with fly-away costs as they measure completely different things. Sales figures usually include many extras like weapons, simulators, training, support, spare parts, spare engines, integration with other (usually local) weapons, and other custom developments that can massively raise the bill. Conversely fly-away costs tend to exclude everything to look as small as possible: things like radars, helmet mounted displays, sometimes even engines are left aside.