descr_sm_resources.txt

The file you can adjust the income from trade.
For example, we want to increase profit from trade skins:
Go to :

type furs
trade_value 4
item data/models_strat/resource_fur.CAS
icon data/ui/resources/resource_furs.tga

and change the profitability of 4 / 40

type furs
trade_value 40
item data/models_strat/resource_fur.CAS
icon data/ui/resources/resource_furs.tga

this way you can change all the resources