I have a wholesale customer that I would like to give an additional 10% discount.

For most items we have a retail price "A" and a wholesale price "B". The % difference between the two varies. I want this customer on price level "B" plus 10%.

I went through Special Prices and added the % discount to every item that customer purchases. However, nothing happened!

I discovered that the 10% was applying to the base price, since the "B" price was lower the customer was given that price instead. I found that if I calculated the discount from "A" (52% in 1 case, 48% in another...) I could make it work. This is not feasible across many items which would have to be calculated individually.

Any way to apply the 10% to the price level the customer is on?