Thank you for your order on each of the following pages there are steps to help you complete the checkout. Did you read the home page? There is very important information there. To save you money on postage I do not use an automatic calculator, I manually add the postage. Whenever possible for Australian customers I use Austpost click and send satchels because it is only $5.70 for up to 500gm, $9.65 for up to 3kg. For goods that do not fit in a satchel postage is by weight. There are postage calculator links in all sections and the weight is on the item. With Austpost rates the price per kg drops dramatically once the parcel gets over 1kg. You will receive two copies of the invoice please pay on the second one that I add the cheapest postage to.