A man is giving his son advice, “Whenever you buy something on the street, offer them half of what they want.”

So the boy is our one day and wants to buy a Coke. He approaches a street vendor and asks how much. The vendor replies, “$2.56.”

The boy says, “I’ll give you $1.28.” The vendor is outraged at first and tries to negotiate a higher price, but fails. He finally gives in, “Okay, $1.”

The boy replies, “64 cents.” The vendor is outraged but eventually agrees again.

This continues until the price is at 2 cents. The vendor says, “It’s pointless now, just have it for free.”

The boy says, “I’ll take two.”