Discount in $ instead of percentage

[kcsr]

My user has been allowing discounts in dollar amount (instead of percentage) to certain customers. I searched through this forum and came up empty. I am under the
impression that it is not a very common practice. Can this feature configured in
some preferences as an option somewhere, E.g. in Customer Maintenance page? If script/code modification is required, besides Customers.php, any other places?

Many thanks!

[phil]

You have to enter discounts as a percentage currently.