Add custom item on the Order Management page
This feature allows to add a "Notes" line, or a manual misc item to an existing order under admin area. This feature allow manually customize the invoice. We simply place text comments as part of the order such as : "NET TERMS", or "USE CLIENT'S FEDEX ACCT # 123456", or "MANAGER DISCOUNT", which becomes part of the invoice.
The feature should allow to set up positive (surcharge), negative (discounts) and zero (free) prices