I don't know, but the economy will never make any sense if I can upgrade a guy from recruit with a pointed stick to a guy on a barded warhorse with a lance for 800 gold but buying a horseshoe off his horse costs 8000. Then when I kill that guy he drops his helmet worth 20K.
It's like weird MMO-style pricing. Gold needs to be put into wall repair, siege engines, feeding armies, holding parties for morale, etc. Not a +2 Mace of Bashing.