We want to sell tills to local hipster coffee shop who are finally embracing the 21st century. We need a new till to replace their vintage machines - unfortunately, hipster staff are too cool to learn a new system, so we need you to build something that they will understand.

This is what a sample receipt looks like:

Implement a system that contains the business logic to produce receipts similar to this, based on a json price list and test orders. A sample .json file has been provided with the list of products sold at this particular coffee shop.

Here are some sample orders you can try - whether you use this information is up to you:

Jane
2 x Cafe Latte
1 x Blueberry Muffin
1 x Choc Mudcake

John
4 x Americano
2 x Tiramisu
5 x Blueberry Muffin

Your receipt must calculate and show the correct amount of tax (in this shop's case, 8.64%), as well as correct line totals and and total amount. Do not worry about calculating discounts or change yet. Consider what output formats may be suitable.

• Add functionality to take payment and calculate correct change.
• Add functionality to handle discounts - in this example, a 5% discount on orders over $50, and a 10% muffin discount.

Implement an user interface that can actually be used as a till.

You may use whatever technologies you see fit.