(self, request)
Returns a Decimal of the amount to be charged.
Returns a Decimal of the amount to be charged.
Returns a Decimal of the amount to be charged .
def get_charge_amount(self, request):
        """Returns a Decimal of the amount to be charged.
        """
        raise NotImplementedError("you must implement get_charge_amount")
def get_charge_amount ( self , request ) : raise NotImplementedError ( "you must implement get_charge_amount" )