Penny Machines: 1,000 credits = $10, 5,000 credits = $50, and 10,000 credits = $100. Dime machines: 20 credits = $2, 100 credits = $10, 200 credits = $20, 1,000 credits = $100 and 2,000 credits = $200.

Overall, there is no strategy that will accurately predict when a slot machine will pay out. That is the whole point of slot machines. They were created to be random, and to not allow people to know when they will hit.