How To: Quantity Discount To Every Custom Field As Fixed Amount

[lateralus578]

Virtuemart Version: 2.022
Joomla Version: 2.5.17

Hello
I`ve searched this forum and watched all tutorials, unfortunately I can´t find a solution to my issue...

I don`t  understand is there a way to apply a discount to custom fields too?
If I have 10 custom fields for my product, they all have different pricing and if I add 10% quantity based discount it will reduce the TOTAL price, that will be wrong.

I have some options (custom fields) that should not be affected, when the amount becomes smaller or larger
I have some  options (custom fields) on which the price should be changed  by 24%, while the price of the other custom field should be reduced by 14%

The only solution I see here is to use a FIXED AMOUNT based on QUANTITY not a percentage

Is there any way I could do that?

Sincerely