Automaker Henry Ford asked electrical genius Charlie Steinmetz to build the generators for his factory. One day the generators ground to a halt, and the repairmen couldn’t find the problem. So Ford called Steinmetz, who tinkered with the machines for a few hours and then threw the switch. The generators whirred to life–but Ford got a bill for $10,000 from Steinmetz. Flabbergasted, the rather tightfisted car maker inquired why the bill was so high.
Steinmetz’s reply: For tinkering with the generators, $10. For knowing where to tinker, $9,990. Ford paid the bill.