Bata Jokes

This urban legend is said to happen to the "King of Shoemakers" Tomas Bata. (He was as important to Czech industry as Henry Ford I to the American one.)
Bata was driving through the country and suddenly he realized that something was wrong with his car. Fearing that he might get stuck in the road he stopped at a village and asked for help. The villains directed him to the local blacksmith.
The blacksmith inspected the engine, did something and the car was OK. Then he asked for 100 crowns. Bata was a bit discontent with paying so much money for a minute's work, so he asked for a detailed bill.
The blacksmith took a pencil and a scrap of paper and wrote:
fastened a screw: 2.00
knew which one: 98.00
--
total: 100.00