Add as many items as you desire to your shopping bag while browsing the store. Once you want to proceed with the order, do so by clicking the shopping bag in the top right corner. Here, you will be able to see all the products you have selected previously.
If you are ready to purchase your item(s), click the "Check Out" button in the bottom right. Enter your information accordingly, and after you place your order, you will be notified when your order is processed, and when it is shipped.