class ATM:
    def __init__(self):
        self.balance = 150.0

    def transaction(self, amount):
        if amount % 10 != 0:
            print('Transaction Error')
            return

        if amount > self.balance - 0.5:
            print('Insufficient funds')
            return

        self.balance -= amount
        self.balance -= 0.5

        print(f'Balance: {self.balance}')

    def run(self):
        while True:
            try:
                amount = float(input('Please enter the amount: '))
                self.transaction(amount)
            except:
                print('Transaction Error')

            print()
            again = input('Do you want to perform another transaction (Y/N): ').lower()

            while again not in ['y', 'n']:
                print('Please enter (Y/N)')
                again = input('Do you want to perform another transaction (Y/N): ').lower()

            if again == 'n':
                break

            print()

        print('Please take your card out')

atm = ATM()

atm.run()