We follow different procedures depending on the type of products in your order. For example, Product A may not require a signature resulting in cheaper shipping fee's. On the other hand, Product B does require a signature so your order will accrue a signature fee ($8.15) built into your shipping price. When you combine Product A and B into one order, you will be charged the additional fee.
One signature fee is charged per shipment. If you order a large quantity and it requires more than one package to be sent to you, we will charge you only once and cover the rest.