Need quick help on a project

I'm trying to create an interactive spreadsheet where as a user is presented with a locked interface - that interface will have buttons and drop down list. So this is the idea...

Sales rep on a call - customer says I have X amount of users, X amount of bandwith, X amount of whatever. Then as the rep enters the info and presses submit - it spits out the recommended product and any cross selling services from other orgs.

I use to be able to do this in older versions of Excel or word, but this new stuff I can't seem to find how to do this?

I have all the data in a spreadsheet already - I just need that interactive part - and then lock it down so somebody can't steal my ideas and say it was theirs... (bet that has happened to somebody here a few times).

I'd even be willing to pay what I can to have help to do this... if we can get it done right.

Thanks -

Bobby
bobbycornwell@earthlink.net