Well, I wish we could say that we actually could talk about real accuracy in the sense that we actually knew what the final prices would be and we could be looking backwards in time. But still at this point, when we're talking about F-35s, and when we're talking about the economy, we're still projecting for it.
So for us it's really giving, as you said, as much transparency as we can give you and also giving you analysis around that transparency.