Descreasing prices on the sum of several products

[pepelarhubarbe]

Hello everyone,

After fruitless searching, I come to you with a question:

Does anyone know how to offer a decreasing price, not on a single article (or even on all declinations of an article) but the combination of several items from the same category.

Example, in my case it's hemp fabric:
Tissue#1 10meter + 20m tissue#2 + 20m tissue#3 = 50meter of products belonging the same category.
Total = 50m. It is from this amount (50 meter) that the price decreases of 20% for example.

Have you done this or seen it somewhere, done it yourself or you know a module that can do this?
I seem to have already crossed this issue but I do not find it again.

(I also try not to change prestashop core to continue to upgrade easily)

Thank you for your help

Stephane

[tomerg3]

If I understand correctly, you want to offer quantity discounts that are across multiple products.

I posted a solution for it in the Third party modules section, it should be in one of the first 3 pages.