Complex interactive form required

First post so hopefully I shall not be flamed too much 🙂

Situation is as follows:

Creating a site and going to be using WP Structure 10 in 1 theme by contempo. It will be a self hosted site using WordPress (hopefully if I can solve the following problem).

I need to have an interactive form which can crate an on screen quote upon final submission…. just think car insurance or something similar where you submit info to gain a quote.

I am aware that all monetary values for every field and variable would be required prior to such implementation and that is not a problem.

What I need to know is if there is a plugin/addon of sort which can handle this sort of thing in wordpress paid or otherwise.

If not then is such a thing feasible in WP? If so my next stop is ODesk to hire someone to get on the case creating such a plugin and if not expression engine it may have to be :(.

Thank you for your time

Craig