Qty discount per category

-- HikaShop version -- : 2.5.0
-- Joomla version -- : 3.4.3
-- PHP version -- : 5.4.10
-- Browser(s) name and version -- : all

Dear Nicolas et al

We are on the threshold of a new Webshop.

Before we start we need to know if The following is possible (and how to implement this):

We have products in categories.
When buying a product there is a quantity discount
This quantity discount is not only n the product itself but on all products in the same category.

f.e.:
In the product group shoes there are 5 products :
red shoes
blue shoes
white shoes
black shoes
green shoes
(these are products, not variants!)

The quantity discount is in steps of 5 pair

If a customer buys:
2 pair of blue shoes,
1 pair of white shoes
3 pair of black shoes
4 pair of green shoes...
he will get the qty discount of 10 pair (whereas - if the qty discount is on the product) there would not be discount at all.

Therefore my Question:
Does HikaShop has the possibility to have a qty discount on a category (instead of a product)

Greetz,

Dick

Thank you, Thank you, Thank you!