Ideas needed for an online quote calculator...

Hey guys,

So I just met with a client who wants an online calculator for home removals based on the types of item in each room. They usually send someone out for an estimate, but they want to do like a self-survey idea...

How it needs to work... The items are to be listed like fridge, chest freezer, lamp, bla bla bla. Then the quantity next to each. Maybe a few extra variables like distance and other things, but it needs to generate a quote based on the items that have been added.

Basically like this app: Removal/Storage Space Calculator. But it needs to give at least a rough estimate straight away!

Is there a good way of doing this, a plug in I could use, or...?

Any ideas would be appreciated!

Scott. =)