Price Rules That Stack — medium Python for AI problem | Incognition

Price Rules That Stack

10 pts · 10 coins

Python for AIMedium

Price Rules That Stack

A shop's price rules stack on top of each other.

The starter code gives you Product(price), where final_price() returns price. Don't change it.

TaxedProduct is a child of Product. Its final_price() takes the parent's final price and adds 20% tax (multiply by 1.2), rounded to 2 decimal places.
SaleProduct is a child of TaxedProduct. Its final_price() takes the taxed price and subtracts 5, never going below 0. Round it to 2 decimal places.

Use super() so that if the tax rule changes later, sale prices change with it.

Examples

TaxedProduct(10).final_price()

returns 12.0

SaleProduct(10).final_price()

returns 7.0

Hints

solution.py

1class Product:
2    def __init__(self, price):
3        self.price = price
4
5    def final_price(self):
6        return self.price
7
8
9class TaxedProduct(Product):
10    # your code here
11    pass
12
13
14class SaleProduct(TaxedProduct):
15    # your code here
16    pass
17