The Business: Smart-Mart is a convenient store that is located in Toronto, Canada. The store needs an application to use it in its daily business. The application will be written by your company for the store. The python GUI Application Description: Registering products: Each product that the system will be dealing with must be registered. The product has the following info: 1. Product Number 2. Product Name 3. Product Description 4. Product Unit Price Individual Billing: When a person shops in the convenient store, the user will do the following: 1. User will input the product number and number of units 2. Step 1 will be repeated until all products entered 3. At the end of the billing, the bill will be generated 4. Consider 13% tax ALWAYS Sales Report: At end of the day or when requested, the system will show the following: 1. The product Names bought 2. Number of units bought per product 3. Total price of the product 4. Totals of the ALL products bought in that day Shipping Products to the store: User will add product to the store after being shipped to the store. The information includes the following: 1. The products number 2. The product units shipped into the store 3. The product wholesale price 4. Product expiry date (if exist) Stocking Report: Another report can be generated. The report will show the products that are about to finish. The minimum number of the product that should be in store is 10. otherwise, system will put the product on order list Project-A: 15% Write the code that will create the interfaces of the application. The application will be GUI interface. The operations code will be ignored in this part. You need just to write the code to create the interface and move from window to another window and closing the application. This is individual part Your code must be completely documented (i.e. commented) This part must be submitted by end of July 19, 2020 Project-B: 25%: Write the code the implement the described operations Your code must be completely documented (i.e. commented) Your code must Not use more than 20% of Internet or not discussed code. You must submit ALL .py files of the whole application (the GUI, database, other codes) You must submit also a .doc file (NOT .pdf) file that works as users guide. In this file, you must explain what all operations the application does, the application files description (what each .py file does), how the user can use the application (i.e. steps), initial password(s), application hardware and software requirements, etc.