Problem with product variant and price impact

[imakemilano]

Hello,

in our shop we sell bulk qty of products and depending on qty purchafed we apply a % of discount..

We sell many products but the discount is % the same for all products, the only difference is that products got differnt attributes (weight):

 

superglue:  10 grams

superglue:  20 grams

superglue:  30 grams

 

 

This is how we apply the discount:

 

10  pieces discont is not applied

60  pieces get 10% discount

120 pieces get 20% discount 

240 pieces get 40% discount  etc

 

% is calculated over the base price and by calculating price impact here > catalog > product > combination.

 

The problem is that prices are not calculated correctlly in product page when we select a a different weight..

It works fine only for the first "weight", it seems that the price is always calculated considering the base price without taking in consideration the price impact..

 

It looks like that the software make calculation without considering the weight, infact when we change from 10 grams to 20 grams calculations are made by using 10 grams price instead of 20 grams price.

 

It is important to say that prices inside the basket are correct, the problem is only visible inside the product page in number of items selection dropdown/radio,

 

I apologize for my cheap english.

 

how can i fix this?

 

Thanks!

 

 

ps: we are using ps 1.6.1.7

Edited September 18, 2017 by imakemilano (see edit history)