Hi,
First of all what do you need ? Overfly fees, Terminal charges, handling fees ?
The amount of fees you will pay depends usually of:
-mass of your aircraft (MTOW).
-flown route (great circle distance or actual distance, in both cases you need to build a route).
-You also need to know if the flight is commercial, private, scheduled or non scheduled.
I can help you if you give me those infos. By the way, mays I ask you the purpose of that study ?
Cheers