Well, if you are asking if that's what they will be charging you, I can confirm that my last charge was at $180 for 25 books. Whether this is the actual cost or if you can get a better rate with your own Fedex account number is another matter.
Technically, it didn't really double that fast, as there were a few months where it went to $120 for 25 books. Honestly, i thought the $90 was a great price for a the longest time and that didn't change for a very long time. I don't know what their actual costs are but at least they are more up to date with respect to information us of the cost. The main issue with the increase to $120 was that there wasn't any updated info.