Write a PHP script to develop a simple web page for an online shop to help the owner of the shop to manage his sales. The shop offers only three different items with different prices and gives a different percentage discount (%) on every sold item.

You need to develop the web page by using only the basic HTML tags that you learnt in M275. The web page should satisfies the following specifications:

1. Displays the name of the online shop. [1 mark]
2. Displays the name, the unit price and the percentage discount of each item. [4 marks]
3. Interacts with a customer to enter the number of units s/he wants to buy from each item. [4 marks]
4. Computes and displays the percentage discount of each sold item. [3 marks]
5. Computes and displays the total amount of each item sold. [4 marks]
6. Computes and displays the total amount of all sold items before and after applying the discount. [4 marks]
7. Computes and displays the total discount amount. [3 marks]
8. Display a suitable message if the customer enters wrong values. [2 marks]