I am the owner of a start-up in Egypt. I am planning to ship my products to one of the fulfillment centers in the US and use one of the fulfillment services to fulfill my orders within US. Do you know what legal work should I do in order to have my products in one of these fulfillment centers? How do I export my products to land into one of these fulfillment centers? What permits should I obtain in order to be able to do that?