This solution is not acceptable because it takes too much time and is not user friendly.
This would be the perfect solution (adding a new field Fixed Discount (€) in Quotation):
http://postimg.org/image/q0rtx8xlj/
It can't get better and easier than that.
Can this be done ? If so, please help me :)
EDIT: Thanks for the link for this app, but it's for version 7, I am using Odoo 8.0 and I can't find a similiar solution.
EDIT2: Yeah, I get this error:
"Error
You try to install module 'adv_and_adddisc_extension' that depends on module 'advance_and_additional_discount'.
But the latter module is not available in your system."
I know nothing about the code so I don't know to to modificate it :/
Thank you Bole, but what is the condition to get Pricelist in Sales ? Do I have to install an additional modul ?
No just enable user to manage psale or purchase pricelist