Interesting site....but don't take it as fact.
I compared their figures on the Dassault falcon 200 Bizjet and they were MILES out.
When I was CP of a Falcon 200 operation in Sin our actual operating costs were roughly 2.5 times their figures all in USD. Our utilisation was double their figure too so if we'd been operating to the same average utilisation our fixed cost/hr would have been astronomically higher....even allowing for our staff costs, which they don't seem to have added in, only adds approx USD600/hr on our utilisation...but the difference between their figure for the falcon and what we actually experienced was USD2200/hr more...and I am talking 5 yrs ago.