class RetailItem:

    def __init__ (self,description,units,price):
        self.__description = description
        self.__units = units
        self.__price = price

    def set_description(self, description):
        self.__description = description

    def set_units(self,units):
        self.__units = units

    def set_price(self,price):
        self.__price = price

    def get_description(self):
        return self.__description

    def get_units(self):
        return self.__units

    def get_price(self):
        return self.__price