A teenager lost his contact lens while out in the back yard. After a fruitless search, he told his mum what had happened. Undaunted, she went outside and, surely enough, returned a few minutes later with the lens.
Her son was astonished, saying, “Mum, I looked for over an hour and couldn’t find it. How did you manage?”
“Easy,” she replied, “You were only looking for a bit of plastic. I was looking for $300.”