categories shipping problem - vm2

[farmaranto]

Hi!
I have a really big problem with shipping rules, please anybody help me!

I bought the category shipping plugin, but it's not enough to solve my needs....

I have about 8 categories : A , B , C , D ,E ,F , G , H
Each category have minimum 2 child categories: A1, A2, B1, B2, C1. C2,
D1, D2, E1, E2, F1, F2, G1, G2, G3, H1, H2

Know, I have three different shipping cost rules :

- The category A follows the rule 1: shippinh cost=0

- The category B follows the rule 2: shipping cost is 8€, it is fix,
so if buy one product, or you buy  10 products belonging to this
category you spend 8€

- The categories C,D, E, F,G, H follow the rule 3: In this case the
shipping cost are calibrated with weights: for example: from 0kg to
1kg you spend 6€, from 2kg to 6kg you spend 7€, from 8kg to 12kg you
spend 10€

So when i buy from different categories i need this kind of sum:
ex.
- 1pz A2 + 3pz B1 = 0+ 8 = 8€
- 1pz A1 + 3pz A2 + 2pz B1 + 4pz B2 + 0,5 kg C2 + 0,1 kg E2 =  0 + 8 + 6 = 14€

Does anybody know What I can do?!
I hope I've been clear enough.

Thank you