Paraphrasing from the video:

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The $1.1 trillion cost is for research, production, maintenance, fuel, and weapons for 2500 planes from the time they first started flying in 2006 until they retire in 2065. When you do the math, this plane is actually cheaper than some other planes. The main reason for the huge dollar number is that it's the first plane to be fully accounted for over the lifetime of the entire program.

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Again, the above is just paraphrasing the claims in the video. They are not my claims.