Reply #1: According to my calculations...

[phantom power]

this installation will cost $173 million. (at today's euro/dollar exchange rate)

I got the cost off of this german release:
http://translate.google.com/translate?hl=en&sl=de&u=http://www.iwrpressedienst.de/Textausgabe.php%3Fid%3D2428&sa=X&oi=translate&resnum=2&ct=result&prev=/search%3Fq%3DMuldentalkreis%2Bsolar%2Bjuwi%26hl%3Den%26sa%3DG

According to the same release, it will provide 40 million kW-hrs per year. If I assume a lifetime of 25 years, that comes to 17 cents per kilowatt-Hour.

They said they got this PV at 40% below normal market cost. (bulk rate?)

To obtain a peak-gigawatt, it would cost them $4.3 billion. For electricity that costs 17 cents/kW-hr, and isn't available at night.