A gambler walks through three casinos. Upon entering, he paid $10.00. He won and doubled all his money in a card game. He again paid $10.00 as he walked out of the casino. In the second casino, he paid $10.00 as he entered, doubled his money upon winning. He paid again $10.00 as he left. He did the same in the third casino but upon leaving, he had nothing left. How much was his original amount of money?

If your answer is $A => Submit A (eg. $10.00, submit 10.00)