I get all of that, 100%. I'm also saying they have been building these planes for nearly 50 years. At what point have we finished paying for the infrastructure

I get all of that, 100%. I'm also saying they have been building these planes for nearly 50 years. At what point have we finished paying for the infrastructure to build these? And I'm guessing it's not possible to add one more plane to this order at or near the 1985 price, which speaks to cost inflation beyond one-offs like documentation updates etc.