The ordering process is a little bit more complicated than just looking up products. The order form itself lists products and amounts, and identifies who the customer for that order is. Identifiers give the products. All that we have to do is check that the products are available in our store, and we can deliver them to the given customer. This is the simplest approach; however, with some products, there are more restrictions. For example, when somebody orders a desk-side lamp, we deliver the power cord separately. The reason for this is that the power cord is specific to the country. We deliver different power cords to the United Kingdom and to Germany. One possible approach could be to identify the country of the customer. But this approach does not take into account that our customers are resellers. All customers could be located in the United Kingdom, and at the same time they may want to deliver the lamp with the power cable to Germany. To avoid such situations...