Curious, Grandpa asked how much they cost. His son replied, “$10 per pill.” Unfazed, Grandpa said he didn’t mind and would leave the money under the pillow before they left the next morning.
The following day, the son found $110 under the pillow and called Grandpa, confused. “Dad, I told you the pills are $10 each, not $110!”
Grandpa chuckled and responded, “I know—the extra $100 is from Grandma!”