Long ago a ten year old boy entered a hotel coffee shop and sat at a table. A waitress put a glass of water in front of him. The little boy asked, “How much is a an ice cream sundae?” Way back then times were different. The waitress answered, “Fifty cents.”
So, the little boy pulled out the change from his pocket and studied the coins. He then said to the waitress, “Well, how much is a dish of vanilla ice cream?” The waitress was growing impatient and responded, “Thirty-five cents.” The little boy again counted his coins and said to the waitress, “I’ll have the dish of vanilla ice cream.”
The waitress brought the little boy the ice cream, placed the bill on the table, and left. The boy finished the ice cream, paid the cashier, and went on his way home. When the waitress came back to clean the table, there were two nickels and five pennies placed neatly beside the empty dish.
You see, he could not have the sundae, because he had to have enough left so that he could leave her a tip.