Kenny is selling his Pokemon cards to buy a ticket to an amusement park, which costs $100. He has a collection of cards and plans to sell them for $1.5 each. He keeps 1/3 of them and gets to go to …👇

Kenny is selling his Pokemon cards to buy a ticket to an amusement park, which costs $100. He has a collection of cards and plans to sell them for $1.5 each. He keeps 1/3 of them and gets to go to the amusement park with $385571 in spending cash. How many cards did he start with?