This reminds me of the story my Dad told me a lot when I was younger. A factory manager calls a repairman to fix a malfunctioning piece of equipment. The repai

This reminds me of the story my Dad told me a lot when I was younger. A factory manager calls a repairman to fix a malfunctioning piece of equipment. The repairman shows up, looks at the machine and taps it once with a hammer. The machine works great again! Then he hands the manager an invoice for $4000. The manager is indignant, "That's ridiculous! I want an itemized invoice!" On the invoice is the following: * Hit machine with hammer: $1 * Knowing where to hit: $3999