You do not even need to be aware of the nitty-gritty details, it's enough to look at any jet program costs. Heck, even the Russians https://en.wikipedia.org/wik

You do not even need to be aware of the nitty-gritty details, it's enough to look at any jet program costs. Heck, even the Russians https://en.wikipedia.org/wiki/Sukhoi_Superjet_100 https://en.wikipedia.org/wiki/Sukhoi_Superjet_100 couldn't build a regional jet below 1.5B.