For a multiple product order, we will make every attempt to ship all products contained in the order at the same time. Some products come from one of our fulfillment centers and some are stocked at our main warehouse. Your order can possibly have multiple boxes shipped on different days from different locations. Products that are unavailable at the time of shipping will be shipped as they become available, unless you inform us otherwise. You will only be charged for products contained in a given shipment, plus any applicable shipping charges. You will only be charged for shipping at the rate quoted to you on your purchase receipt. The entirety of this shipping charge may be applied to the first product(s) shipped on a multiple shipment order.