looking for plugin to calculate prices

I am looking for a plugin that can calculate prices for vacation houses. I have pricelists with quite a few periods (about 8-10 different periods throughout the year) and I want the customer to just select the kind of accomodation (2-room apartment, 3-room apartment etc.) and the period of his stay and the plugin should calculate the total price.

I have been looking around, but I found either high-priced real-estate or vacation solutions or just a simple calculation that is not enough for me.

Any help/ideas which plugins might be good for me?

thanks, max