Phil anthropist likes to give away money?

phil anthropist likes to give away money. one day he was feeling especially generous, so he went to the park with a wad of money. he gave $100 to a man feeding pigeons. he then gave half of his remaining money to a child licking an ice cream cone. he then gave $50 to the balloon seller. he then bought a hot dog and paid for it with a $20 bill."keep the extra for a tip", he said to the hot dog seller. then he gave half of his remaining money to someone giving a sermon on a soapbox. at this point, he has $3 left and stuck it under the collar of a stray cat. how much money did phil have when he started his good deeds?