Hello,

I would like to create a price list to have a discount on a certain number of items regardless of the number of different references in the invoice.

For example: 
12 items ordered minimum to get 14% discount. (3 references A + 9 references B)
or
24 items ordered minimum to get 20% discount. (5 references A + 7 references B + 10 references C + 2 references D).

I'm stuck because I can just create a discount on a certain number of items for one and only one reference. 

Can you help me?

Thanks in advance.