Grandma and Grandpa visiting their kids overnight

The son said, “I don’t think you should take one Dad, they’re very strong and very expensive.”

“How much?” asked Grandpa. “$10.00 a pill, answered the son. “I don’t care,”‘ said Grandpa,“I’d still like to try one, and before we leave in the morning, I’ put the money under the pillow. ”

Later the next morning, the son found $110 under the pillow. He called Grandpa and said, “

I told you each pill was $10, not $110. “I know,” said Grandpa.

“The hundred is from Grandma!”