"Old man, get it together. I said I needed four crates of iron ores, two crates of alum ore, and one crate of the calcium powder. Then I needed four large sacks of the rocky mountain salt. You keep trying to sneak them out of the deal here. I won't pay more or less so make this deal or show me another stall that will." Ralph's brutal way of negotiating to make sure that he would get what Isa wanted attracted a few onlookers. He was offering a significantly lesser price for all the bulk items that he wanted than on the list Isa had given him.
This was part of the plan though. Ralph had seen people haggle at the market before. This was the way he had learned growing up while running through the streets. If he wanted food, he would haggle to get the price down well below what he had. A basic survival tactic for someone like him.
basically, they robbed the guy but also let him have a chance to get more money. take and give I guess.