After all the items you want are in your cart begin the checkout process.
You will be prompted to enter your name and shipping address.
After you complete the name and address screen you will be shown the shipping options and costs of each option.
At this point you can modify or cancel the order and you will not be charged for anything. You can also proceed with the order and finalize it on the payment screen.
Shipping charges are based soley on the weight of the items and the destiantion of the order.
International customers are responsible for duties or customs charges on their orders.