Your figures don’t add up and unless you have an extremely credible source for that figure, I wouldn’t use it. Right now, I don’t know that any of the players have a reliable cost.
http://www.flightglobal.com/articles/2010/03/19/339714/f-35-cost-estimate-grows-up-to-nearly-90.html
And if you don’t mind, post your source stating the Dutch have “left the program”. I found one article from Dutch News on 29 June and it appears that at the time (2 weeks ago) they hadn’t made a decision and another at what appears to be a blog, but a pretty well referenced one. That’s not saying they won’t quit, I can’t find any evidence that they have.
http://www.dutchnews.nl/news/archives/2010/06/pulling_out_of_jsf_threatens_s.php
http://sites.google.com/a/greateryuma.org/jsf/project-updates
I corrected myself if you bother to read post number 7.