Perhaps I could start, and Mr. Slack could give you some more specifics on studies that the partner countries and the joint project office have done.
In a more global sense, we expect it to be in the same range of $250 million annually that we spend on F-18s or any other similar aircraft. However, we'll have not a fleet of 138 but a fleet of 65. We'll have a single engine instead of dual engines. It's well known that fifty percent of the maintenance cost for a jet fighter is for the engine. So we're going to a very reliable level of technology and engine that is several generations beyond the F-18 engine, and a single engine.
Clearly, globally again, we are going to exercise the economy of scale, with all of our partners, on spare parts, maintenance procedures, the cost of developing new releases of software, and so on, and we really hope to drive that down below what we have had to expend to maintain our F-18s.
Perhaps Mr. Slack could comment a bit more on some of the detailed studies.