> SLS is a new rocket and you are comparing its development cost to the launch cost of a SpaceX rocket without its R&D cost.

Look on Wikipedia, the sideboard quotes cost per launch as:

> Over US$2 billion excluding development (estimate)

I'm not aware of the pricing of Soyuz and Ariane V, though.

>> I'm not aware of the pricing of Soyuz and Ariane V, though.

Both of which are much more SpaceX alternatives than SLS.