Hi,
I need to have some extra ability to add negative price in order edit page!
We have a Drink shop and deliver drinks in our area! so our customers order some drinks! for example Cola, on delivery most of our customers have empty bottles and in Denmark most of those bottles have deposit (Pant in Danish), so we should return them some amounts! and because of that we cannot using coupon systems in magento, and the bad news is we must put those information's in our invoices.
So how can I do that ? is there any module/plugin or way to give negative value to a certain product or add discount amount manually directly in order edit page ?
Looking forward!
Thanks a lot
Best Regards,
Rahila