Allow us to enter a quantity discount by percentage instead of being forced to enter an exact dollar amount. I just got embarrassed by this AGAIN because I changed prices on some items and forgot to update the quantity discounts, not to mention that updating each quantity discount price manually (even if doing it in excel) is very time consuming. I yanked 3 votes from other ideas that were going nowhere because this one bites me fairly frequently.

I want to set a percentage and never have to worry about it again! (I did this on my old cart, and it was ANCIENT... I can't believe AC can't do this!!)