A carnival game involves drawing cards from a deck of 60 cards. The deck contains 20 blue cards, 20 orange cards, 10 purple cards, and 10 yellow cards. Drawing a blue card costs you 1 credit. Drawing an orange card earns you nothing. Drawing a purple card earns you 5 credits. Drawing a yellow card earns you 8 credits. If the game costs 3 credits to play, how much can you expect to win or lose per game over time