Saturn V - inherently expensive or simply no economy of scale?

Was the Saturn V an "inherently expensive" launch vehicle or were it's
$/lb to orbit more a function of lack of scale - ie frequency of
launch? http://en.wikipedia.org/wiki/Saturn_V#Cost gives a figure of
$2.4 to $3.5 billion per launch in 2007 dollars but does not state how
much of that was the fixed costs and how much was marginal.

rick jones
--
I don't interest myself in "why". I think more often in terms of
"when", sometimes "where"; always "how much." - Joubert
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...