I need a SIMPLE program/script/plugin so that a person can push an "add to basket" button, get it into the basket, have the possibility to add several products etc. And the program/script whatever must add up the sums so that the customer can see the full price.
But it's gotta be as simple as possible. Maybe something like this: bokmarkedet.no/shop/cart.php
It's in Norwegian, but you probably get the point.