The per plane cost varies a lot depending on what you want to wrap in it: how much of the development costs you amortize, the modernization program, etc. but $2

The per plane cost varies a lot depending on what you want to wrap in it: how much of the development costs you amortize, the modernization program, etc. but $200m is in the range. ("Total acquisition costs" vs the marginal cost of the next plane can result in a more than 2x difference in how much you think the plane costs) The flyaway cost of buying one more plane is probably a bit under $100m though.