Nighthawk117
I don't doubt the figures for a moment, but I guess, and I haven't checked, so if I'm wrong, my apologies, that these are the "published rates".
As with all published rates in the business world, they reflect the charges the supplier would like to achieve, and would apply to a one off customer. However no major, let alone principal customer, is going to pay the published rate - especially not Ryanair, who know that passenger traffic wise they have Prestwick by the proverbial short and curlies.
If Ryanair were to be paying the full whack, then probably the airport wouldn't be hurting the way that it is.
As for applying a "development fee" this may be commercially feasible at remote airports, such as Newquay, but I don't think you'd see Ryanair for dust if the same trick was tried at Prestwick. They'd be off to GLA like a shot.