Confirm purchase order issue.

The screen appears:

1. Input the purchase order number.
   If you leave it blank, it will list all open purchase orders.
   Another screen appears:
   
   
   
2. Cick "CONFIRM" button.
   Choice which Po number you want to confirm.
   
   
   
   
3. Select "YES" and click "SUBMIT" button.
   This purchase order is confirmed