Problem with increasing price according attributes

[LavienRose]

So I am trying to make the price grow according what customers select but I can't figure out what's wrong.

 

Original price: 250€

 

Attribute A - Value A no increment in price

Attribute A - Value B increments final price by 50€

 

Attribute B - Value A no increment in price

Attribute B - Value B increments final price by 10€

 

When I select A-B the price updates to 300€, but when I select B-B and I expect the price to be now 310€, nothing happens. Same thing if I leave A-A, B-B won't update my price to 260€.

 

I find myself really hard to understand these mechanisms despite all my will to read documentation. Without even mentioning that if I try to overwrite original price instead of adding increment on it, it doesn't work at all.

 

Once more I rely on one of you more conscious of PS dynamics, and I thank in advance whoever got to read until this point.