I offer a shipping discount. The first item has the full shipping price, then after that, each additional item has a ship cost of $0.30. Any free shipping item will count as your first item, then any item after that having a SHIPPING COST will be $0.30. For example, you buy three items from me. Items A and B have free shipping while item C has a shipping cost of $1.25. Because you have made a multiple purchase, I will consider item A to be the first item. Now item C qualifies for the shipping discount, item B has free shipping so your total shipping cost for all three items is $0.30.