Writre in Python Code Please Create class named RetailItem that holds data about an item in a retail store. The class should store the following data in attributes: item description, units in...

Writre in Python Code Please

Create class named RetailItem that holds data about an item in a retail store. The class should store the following data in attributes: item description, units in inventory, and price. Once you have written the class, write a program that creates three RetailItem objects and stores the following data in them:

Create  CashRegister class that can be used with the RetailItem class. The

CashRegister class should be able to internally keep a list of RetailItem objects. The

class should have the following methods:

• A method named purchase_item that accepts a RetailItem object as an argument.

Each time the purchase_item method is called, the RetailItem object that is passed as

an argument should be added to the list.

• A method named get_total that returns the total price of all the RetailItem objects

stored in the CashRegister object's internal list.

• A method named show_items that displays data about the RetailItem objects stored

in the CashRegister object's internal list.

• A method named clear that should clear the CashRegister object's internal list.

Demonstrate the CashRegister class in a program that allows the user to select several

items for purchase. When the user is ready to check out, the program should display a list

of all the items he or she has selected for purchase, as well as the total price.