input: Write a python function to create an Invoice object and get its item and price.
  assert create_invoice_and_get_details("Pen", 3) == ("Pen", 3)
  assert create_invoice_and_get_details("Notebook", 5) == ("Notebook", 5)
  assert create_invoice_and_get_details("Eraser", 1) == ("Eraser", 1)
output: def create_invoice_and_get_details(item, price):
      class Invoice:
          def __init__(self, item, price):
              self.item = item
              self.price = price
          
          def get_details(self):
              return (self.item, self.price)
      
      invoice = Invoice(item, price)
      return invoice.get_details()