Dragon to cost about $140 million per launch

No, I didn't. *My original comment was that Dragon was quoted by SpaceX
as being about one-tenth the cost of a Shuttle mission. *$1.4 billion
divided by 140 equals 0.1.

For a crew changeover mission, it's still going to be much less
expensive to use Dragon than to use Shuttle; even with a resupply
performed by shuttle at the same time. *They've never transferred more
than few tonnes at each shuttle docking, except modules (hardly relevant)..-

since the standing army cost to launch any shuttle was a ongoing
expense......

5 billion per year with one shuttle launched every 2 years, the cost
of a single flight every other year
10 BILLION

unless shuttle C had been built..... the infrastructure and launch
teams the same, it would of retained the unique shuttle abilities at a
realtively low cost.....

featuring multiple resupply trips, the ability to launch new modules
and big replacement parts, add a capsule somehow to the C version,
with better safety, like launch boost escape...

when a shuttle did fly, minimially man it with crew of 2, with
ejection seats. or a jetisonable crew pod.....