Here's an interesting problem. Do you need to stretch your mathematical brain cells or your logical brain cells for this one?

Before a shrine in southern France, a peasant knelt and prayed. He asked the good Lord to double the amount of money he had in his pocket. If this was done, he would gladly leave $20 at the shrine to be used for charity. His prayer was answered, but after leaving the $20 he found, to his utter dismay, that he had less than when he made his request!

Going to a second shrine he repeated the same prayer. It was answered and he left another $20. But the amount in his pocket was dwindling.

Hopelessly he trudged to a third shrine, made the same request and when his prayer was answered he donated another $20 but it was with a heavy heart that he discovered he had no money left for himself!

HOW MUCH MONEY DID THE PEASANT HAVE WHEN HE KNELT AT THE FIRST SHRINE?