The 📈 cost of play on slot machines is built into every spin. If the payout is 90% to the customer, then 📈 the cost of play is 10% per spin. If you were playing at a rate ofR$1 per spin with a 📈 90% payout, on average you would haveR$0.90 remaining. Therefore, your cost of play would beR$0.10 per spin.