How much money does Jurgis have? What happens to it?

Jurgis has $100.00; He finds an empty saloon, goes up to the barkeeper, and asks him to change the bill. The barkeeper agrees if he will buy a beer, and so Jurgis does. The barkeeper pours the beer and gives Jurgis ninety-five cents in change. Jurgis asks where the other ninety-nine dollars is, and the barkeeper only looks at him strangely telling him he must be mistaken.