PLEASE USE PYTHON 3 TO SOLVE! THANKS!

PLEASE USE PYTHON 3 TO SOLVE! THANKS!

Example 3 Using Retailltem class from previous exercise, create another class named CashRegister that can be used with the Retailltem class. The CashRegister class should be able to internally keep a list of Retailltem objects. The CashRegister class should have the following methods: - purchase_item: That accepts a Retailltem object as an argument. Each time the purchase_item is called, the Retailltem object that is passed as an argument should be added to the list. get_total: Returns the total price of all the Retailltem objects stored in the CashRegister object's internal list. show_items: That displays data about the Retailltem objects stored in the CashRegister object's internal list. clear: That clear 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 for check out, the program should display a list of all the items he/she has selected for purchase, as well as the total price