Help me charge my client

Hi Guys, It’s been a long Time.
I Was out of the country, but now I’m back and ready for business.

I would like to ask you guys a question.
I’m actually building an Interactive Presentation CD For a Hotel (Wich is quite Huge) Wich will Contain A Animated Interactive Tour : Text, Images, Voices Musics, Animations and Videos
And a NON Animated Version That will Contain : text and Images Only.
As for technology used, : (Flash MX 2004)ActionScript, Html and Java Are Mostly Used.
For a total of about 50 Mbs of Data (cuz they want to publish it on small business card CDs)

My Problem is that I don’t have any Idea of how much to charge such a work.
And they Ask me to come and discuss the price tomorrow.
(I dont wanna go to High, and I dont wanna be ridiculus, I wanna be just Right)

Please Help