[HOWTO] - TURN OFF TAX on QUANTITY DISCOUNT value - [ HOWTO?]

[jeroendielemans]

The problem is that I can fill in an amount in the backoffice/quantity discounts, which is going to be subtracted from the unit price when a specified amount of products is being ordered.

So far so good.

BUT: let;s say I fill in an amount of 10 euros when the customer is buying 10 units.
What I want the system to do is this:

Product price is 100 euro. (ex. Tax)
Discount is 10 euro when buying minimum of 10

100-10= 90 euros

Price for product is 90 euros (ex tax) per unit when buying 10.

But the system does this:

Product 100 (ex tax)
Discount 10 (WITH TAX)!! so it calculates it down to 8,40

My unit price will then be: 91,60 instead of 90.

Thats the problem, and I cant imagine there are people who really think this is a normal system behaviour!!!
I already lost my job on this one, but I am still want to solve this PROBLEM