You are the owner of a cafe where 3 chefs work: a JapaneseCook, RussianCook and ItalianCook. Each of them can prepare the national food and beverage:
- JapaneseCook: Sushi and Tea;
- RussianCook: Dumplings and Compote;
- ItalianCook: Pizza and Juice.
Your task is to create 3 different subclasses (one for each chef) which are the children of an AbstractCook and have these methods:
- add_food(food_amount, food_price), which add to the client's order the value of the food which he had chosen;
- add_drink(drink_amount, drink_price), which add to the client's order the value of the drink which he had chosen;
- total(), which returns a string like: 'Foods: 150, Drinks: 50, Total: 200', and for each chef instead of the Foods and Drinks will be the national food and drink that he’s used.
Every client can choose only one chef. In this mission the Abstract Factory design pattern could help.

Example:

client_1 = JapaneseCook()
client_1.add_food(2, 20)
client_1.add_drink(5, 4)
assert client_1.total() == "Sushi: 40, Tea: 20, Total: 60"

client_2 = RussianCook()
client_2.add_food(1, 40)
client_2.add_drink(5, 20)
assert client_2.total() == "Dumplings: 40, Compote: 100, Total: 140"

client_3 = ItalianCook()
client_3.add_food(2, 20)
client_3.add_drink(2, 10)
assert client_3.total() == "Pizza: 40, Juice: 20, Total: 60"

All data here will be correct and you don't need to implement the value checking.

Input: Statements and expressions of the 3 chefs’ classes.

Output: The behaviour as described.

How it is used: Work with classes and object-oriented programming is considered to be on a much higher skill level which you should reach in order to put Python to full use.

Precondition: All data is correct.