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This is a game where you are scored in detail on the ``most correct way to pay small change.You can learn the optimal solution for small change payments.Ideal for:●Those who want to train their brain with change calculations●Elementary school students who want to improve their math skills by calculating change●Those who are having trouble with their coin purse full of moneyWe have thoroughly focused on the algorithm that constantly evaluates the optimal payment method that allows the highest number of payments and the least amount of change.It is a money game that continues to pursue practical optimal solutions.You can check your payment history and change your payment method at any time.In addition to your payment history, well also show you the best payment methods we recommend.You can learn the optimal payment method by comparing your payment history.