Items that you wish to purchase are placed in your virtual shopping cart. You may edit or review the items in your cart at any time by clicking on "Shopping Cart" at the top of every page. Items are retained in your shopping cart indefinitely provided you are logged in to your account when shopping. It is also important to note that adding items to your shopping cart does not necessarily lock in the price. Items in your Shopping Cart reflect current prices. Prices may change between the time you place an item in your Shopping Cart and when you actually complete your purchase. The final price charged for any item is the price at the time you complete your purchase.