How to purchase an application from the Windows Store in Windows 8?

Note: Please setup a Microsoft account and Billing information before proceeding to the following steps.

1. From Start, select Store app.
   
2. Select the specific application that you would like to purchase.
3. Select Buy.
   Note: User may have an option to try the software before purchasing the application.  
    
4. Select Confirm.
    
5. Enter your Microsoft account information.
    
6. Select OK.
7. The application is now purchased. Download and installation will begin.
8. Switch back to the Start screen to launch the purchase application.