Many historical examples
Often attributed also to Edison
Example: [Cerf, 1945]
Nikola Tesla visited Henry Ford at his factory, which was having some kind of difficulty. Ford asked Tesla if he could help identify the problem area. Tesla walked up to a wall of boilerplate and made a small X in chalk on one of the plates. Ford was thrilled, and told him to send an invoice.The bill arrived, for $10,000. Ford asked for a breakdown. Tesla sent another invoice, indicating a $1 charge for marking the wall with an X, and $9,999 for knowing where to put it.