Coffee Shop

Write a class called CoffeeShop, which has three instance variables:

1. name : a string (basically, of the shop)
2. menu : a list of items (of dict type), with each item containing the item (name of the item), type (whether a food or a drink) and price.
3. orders : an empty list

and seven methods:

1. add_order: adds the name of the item to the end of the orders list if it exists on the menu, otherwise, return "This item is currently unavailable!"
2. fulfill_order: if the orders list is not empty, return "The {item} is ready!". If the orders list is empty, return "All orders have been fulfilled!"
3. list_orders: returns the item names of the orders taken, otherwise, an empty list.
4. due_amount: returns the total amount due for the orders taken.
5. cheapest_item: returns the name of the cheapest item on the menu.
6. drinks_only: returns only the item names of type drink from the menu.
7. food_only: returns only the item names of type food from the menu.

IMPORTANT: Orders are fulfilled in a FIFO (first-in, first-out) order.

Examples

tcs.add_order("hot cocoa") ➞ "This item is currently unavailable!"
# Tesha's coffee shop does not sell hot cocoa
tcs.add_order("iced tea") ➞ "This item is currently unavailable!"
# specifying the variant of "iced tea" will help the process

tcs.add_order("cinnamon roll") ➞  "Order added!"
tcs.add_order("iced coffee") ➞ "Order added!"
tcs.list_orders ➞ ["cinnamon roll", "iced coffee"]
# all items of the current order

tcs.due_amount() ➞ 2.17

tcs.fulfill_order() ➞ "The cinnamon roll is ready!"
tcs.fulfill_order() ➞ "The iced coffee is ready!"
tcs.fulfill_order() ➞ "All orders have been fulfilled!"
# all orders have been presumably served

tcs.list_orders() ➞ []
# an empty list is returned if all orders have been exhausted

tcs.due_amount() ➞ 0.0
# no new orders taken, expect a zero payable

tcs.cheapest_item() ➞ "lemonade"
tcs.drinks_only() ➞ ["orange juice", "lemonade", "cranberry juice", "pineapple juice", "lemon iced tea", "vanilla chai latte", "hot chocolate", "iced coffee"]
tcs.food_only() ➞ ["tuna sandwich", "ham and cheese sandwich", "bacon and egg", "steak", "hamburger", "cinnamon roll"]

Notes

Round off due amount up to two decimal places.