If you are going to include the non-recurring costs of Falcon/Dragon
in the per-ton figures, you need also to include the non-recurring
costs of Shuttle.

the Shuttle R&D costs was already amortized 30 years ago, while, NOW
the REAL price for the CURRENT annual NASA budget is $600M

also, the $600M "price" INCLUDES the annual fixed costs, while, the
Falcon/Dragon "annual fixed costs" at KSC are "FREE" for SpaceX !!!

that, since, NASA gives its know-how and assistance, the launch base
and everything needed to launch the Falcon-9 from KSC, entirely FREE

in other words, SpaceX will send 20 tons to the ISS for $2.1 billion
ONLY thanks to these (very expensive) "services" given FREE since paid
by the NASA budget/US taxpayers dolalrs!!!

if we add the costs that SpaceX has FREE from NASA (KSC, launch base,
launch pad, assembly building, launch costs, NASA engineers and know-
how, etc.) the price-per-ton-to-ISS could likely cost, not "only"
$105M per ton, but $200-300M per ton or more!!!!!!!!!!!!!!!!!!!

so, the "cheap" SpaceX prices are mainly due to the money given away
by NASanta Claus...

..