An Old man was selling Watermelons.

His Pricelist reads :

1 for $3 and 3 for 10$.

A young man stops by and asked for One watermelon.

“That would be 3 Dollars for One”, says the Old Man.

The Young man then buys another One and another one, paying $3 for each.

When the Young man was leaving, he turned around and said,

“Hey Old man, do you realize I bought 3 Watermelons for just $9? Maybe you are not that good at doing Business”.

The Old man smiled and said,

“People are funny. Every time, they buy 3 Watermelons instead of 1 and they try to teach me Business.”