Guys i want to apply discount on every 3 product pack, For example if customer bought 3 product from a specific category he will get $5 discount. But if he buy 4 or 5 products from same category then discount should apply on 3 pack. And remaining 2 product price will be same.
And same discount will be applied for multiple of 3 , 6 ,9 , 12, 15 and so on..
Thanks for the help..