Shipping problem...

Hi all, I have a problem which I'm not sure the best way to go about. We will be shipping products based on weight and I have two types of product with differing weights. Basically we want to charge one price for shipping less than 10 KG and one for anything over that. I wonder how to go about it. I have the weights for each product and have my products organised into two categories in MySQL DB. So anything in category 1 means less than 30 items is below 10 Kilos and 15 in category 2. How would you code this? I have tried adding a weight category to my products table and calculating total weight (then a simple if statement would do the trick) but it leads to other problems which I couldn't de-bug. Basically adding to my products table means my DB won't update due to a Mysql error (column count didn't match or something) so I can't do it that way or at least as my shop is currently working I'm scared of messing with the code too much! I also need to have a combination of the two products so the customer might buy 1 of category 2 and 35 of cat 1 etc. Ideas to tackle this please? Steve Jackson Web Developer Viola Systems Ltd. http://www.violasystems.com stephen.jackson@violasystems.com Mobile +358 50 343 5159