An old man is selling watermelons by the side of the road.
His sign reads:
1 for $3
3 for $10
A young man stops and buys one watermelon.
โThatโll be $3,โ says the old man.
The young man then buys a second watermelon. And then a third.
After paying another $3 each time, the young man picks up his watermelons and starts to walk away.
Then he turns back, grinning proudly.
โHey old man,โ he says, โyou realize I just bought three watermelons for $9 instead of $10? Maybe business isnโt your thing.โ
The old man smiles and shakes his head.
โFunnyโฆ every time somebody comes by, they buy three watermelons instead of oneโฆ and then try to teach me business.โ