A company wants to track their customers' orders.
Customers can give a bunch of orders.
Each order has a date, order number, a number of products with with different amounts.
Each products's price is also required to be able to set seperately,
and different products have different VAT percentages. Create the required system for the products, orders and customers.
View customer's orders and order details, and the total amount due
Classes:
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Customer
Order (date, id, orderItems)
OrderItem(Product, amount)
Product(name, price, tax)
