When you are ready to complete your purchase, click "Checkout" and all complete registrations and applications will appear as "Items Ready For Checkout" along with their total price. You can remove items you do not wish to pay for at that time by deselecting the checkbox next to the item.
If you have an incomplete item in your cart, it will not appear alongside your completed items and will display a message noting the number of items with incomplete information. You can complete an unfinished form at anytime by returning to your shopping cart and clicking "edit this item".
After filling out your credit card information, click the "Finish Transaction" button at the bottom of the screen to complete your purchase. You can view your purchase history anytime by clicking "My Account" in the upper right corner of the screen and then clicking "History".