Taking into account discounts on fuel stations

I have permanent discounts on some fuel stations. For instance: in Poland with Karta Dużej Rodziny I have 10gr discount on LPG on Orlen and 8gr discount on Lotos. Currently, the ordering of stations by price is incorrect and therefore unusable. Is it possible to add a setting of permanent discounts for specific companies, eg Orlen or Lotos fuel stations.