> If these costs are amortized over 10 launches of the SLS vehicle during the 2020, the per-flight cost would be approximately $4 billion per flight. and they

> If these costs are amortized over 10 launches of the SLS vehicle during the 2020, the per-flight cost would be approximately $4 billion per flight. and they go on to say >Moreover, this is just for the SLS rocket's core stage, side-mounted boosters, and a basic upper stage. Developing and adding the Exploration Upper Stage will add hundreds of millions of more dollars. 5 billion might be the final dollar figure per launch. I figure Boeing will still be trying to get it off the ground while Elon is sending and landing ships on the Moon or Mars. Nuts....