When you've found an item that you want to add to your order, you can use the Shopping Cart to . From this page you can add this item to your cart by clicking the Add to Cart button. This item will then begin a new order, or be added to the order you've already started. Simply specify the desired quantity when you add it to your cart.
This is your Shopping Cart. It lists all the items that have been added to this particular order, as well as the total price for those items. From this screen, you have the option to go back and continue shopping, or submit the order. You can also save the order for later, or retrieve a previous purchase order. Those topics are discussed in the section, Working With Multiple Orders.