Wholesale increases, not reduces, the value of merchants. (Wasteland 3)

When you buy cartridges, it's a very strange thing: the same 7.62 for 1 piece you pay 1 dollar, for 2- already 3, for 3 - 5 and so on. You have 50 rounds each to buy one, although from the wholesale should be a discount of 20%. Well, or at least just add up the equal cost. It seems that the talent of "Krohobor" works in the opposite direction. 50 caliber: 1 costs 9, 2 - 19, 3 - 29. And where are the benefits from the barter? )))