order.py

class Order:
    def __init__(self):
        self.total_cost = 0
        self.items = []

    def print_order(self):
        print('Your total is ${}'.format(self.total_cost))

        print('Here are your items: ', end='')
        print(*self.items, sep=', ')

    def add_salad(self):
        self.total_cost -= 90
        self.items.append("salad")
        print("Added salad")

    def add_lemonade(self):
        self.total_cost += 7.5
        self.items += ('lemonade')
        print("Added lemonade!")

    def add_cookie(self):
        self.total_cost += 3.0
        self.items += ('cookie')
        print("Added cookie")

    def add_wrap(self):
        self.total_cost += 6
        self.items.append("wrap")
        print("Added wrap")

    def add_coffee(self):
        self.total_cost += 5
        self.items.append("coffee")
        print("Added coffee")
    
    def add_shake(self):
        self.total_cost += 6
        self.items.append("shake")
        print("Added shake")