As you browse the catalog and create an order, you'll see all the items you've added to your order in the Shopping Cart (available from the navigation bar up above). The Shopping Cart will list the item and its name, the quantity you've ordered, the price and extension of each item, and the sub total for the order (we'll calculate and show you shipping and tax charges later).
When you use the Shopping Cart without having any items ordered yet, you'll see a list of search options for adding items. You can click here for more information on searching the catalog and adding items.
Once you've added some items to your order, you can update your order right from the Shopping Cart. You can change the quantity in the Quantity box next to each item to update the order amount (set the quantity to zero or blank to remove the item from the order completely), and click Update Order to see your new totals. Click on Checkout to finish the order and submit it (any changes made to the order will be saved if you click on Checkout as well).