Base price reduction in function on quantity

[RockyKnowledge]

Hi to all,

I've developed a shop for a client that need more attributes' combinations. I've purchased Attribute Wizard Pro and all work fine.

Now I have a problem: client want that the base price reduct if in the cart there are X quantity of product with attribute Y.

 

Es: product SHIRT with base price 5€ that increase to 6€ if PRINTING COLOR is select (PRINTING COLOR is an attribute that increase base price of 1€). If in the cart there are from 1 to 10 SHIRT PRINTING COLOR, price base reduct of 0,10€, from 10 to 50 reduct of 0,15 etc etc. The amount of reduction is different for every attribute (we have 5 categories with 12/13 value).

 

How can I resolve this problem?

 

Thanks

 

Ps: sorry for my bad english :-D