Experience

 

A ship engine failed, NO ONE could fix it.

Then they brought in a man with 40 yrs. on the job.

He inspected the engine carefully.
Then reached into his bag & pulled out a small hammer.

He gently tapped a spot.

Immediately, the engine rocked into life. It was fixed!

7 Days later, the owners got his bill for $10,000.

'What?!' the owners exclaimed.
'He scarcely did anything.'

They asked for an itemized bill.

His response:
"Tapping with a hammer = $2
Knowing where to tap = $9,998"

Lesson: Don't Ever Underestimate Experience!