Ali-Mahmood / checkout

checkout

Step 1: Shopping cart

• You are building a checkout system for a shop which only sells apples and oranges.
• Apples cost 60p and oranges cost 25p.
• Build a checkout system which takes a list of items scanned at the till and outputs the total cost
• For example: [ Apple, Apple, Orange, Apple ] => £2.05
• Make reasonable assumptions about the inputs to your solution; for example, many candidates take a list of strings as input

Step 2: Simple offers

• The shop decides to introduce two new offers
  1. buy one, get one free on Apples
  2. 3 for the price of 2 on Oranges
• Update your checkout functions accordingly

Step 3: Add Bananas

• Price of Banana is 20p.
• Bananas are on buy one get one offer.
• When Bananas are bought together with Apple cheapest one is free.