Cost Estimator Script

I'd like to see if you can put together a 'build your own project' type of Flash or Javascript interface, where a client can get an estimate based on what their needs for a particular project are. If you've ever been to Apple's Mac ordering page, it would look something like that. [login to view URL] When you click on various radio buttons it changes the price up or down depending on your selection. So I think what I would like to do is the following: Ask, 'What type of project is it?'.... Wedding, Feature Film, Short Film, Corporate/Training, etc. Depending on what they answer it would spawn some more questions. But these would stay the same: Approximately how much time is your event? How many cameras do you need? Do you require editing? Do you require DVD cover and box design? From that, the computer would calculate based on my rates and how many people are involved in the shoot how much the estimate would be. You will be paid via PayPal!