A man worked in a factory and worked on the same machine all his life. This machine was unique and whenever it broke down, he would fix it. He was the only person who used the machine and the only one who could fix it and keep it running.The time came for the man to retire. The whole company turned out and wished him well.A couple of months later, the machine broke down. There was no replacement in existence so the Company Director rang the man and asked him to come in as a consultant to have a look at the machine and fix it.The man came in, spent 15 minutes looking over the machine, pressing his ear to it, peering into gaps until he reached in to his bag and brought out a hammer. He then gave the machine a small tap and lo and behold, the machine was FIXED!The director was overjoyed and asked the man to send him his invoice.The invoice arrived for £10,000. The director was furious and immediately rang the man and demanded that he send a breakdown of the invoice and the tasks he performed.He received the following:Hitting the machine with a hammer .. .. .. £5.00KNOWING where to hit the machine with a hammer .. £9995.00The director paid the invoice without complaint.