Meaning if I choose for the OTO to replace the order. when the customer hits the OTO the previous order is automatically canceled, and replaced by the OTO. that way the customer would only recieve the OTO and not the orignal item. This way if I make a deal where if they upgrade to three of the item im selling and I give them a discount, they are not charged for the single one they purchased AND the three, instead just charged for the 3 pack that gave them the discount. So an option for the builder when they hit OTO to either cause the OTO to be added to the original purchase, or to cancel the orignal purchase and replace it with the OTO