Given the following Aggregate root code snippet, what will be the output of order.total_price()?

Given the following Aggregate root code snippet, what will be the output of order.total_price()?

class OrderItem:
    def __init__(self, price, quantity):
        self.price = price
        self.quantity = quantity

class Order:
    def __init__(self):
        self.items = []
    def add_item(self, item):
        self.items.append(item)
    def total_price(self):
        return sum(i.price * i.quantity for i in self.items)

order = Order()
order.add_item(OrderItem(10, 2))
order.add_item(OrderItem(5, 4))
print(order.total_price())