We have just updated our International shipping policy. Now, each order is charged a flat rate of $7 for shipping. This is almost always going to be less than the actual cost, but it will be easier for everyone than our previous system (sending separate shipping bills for each order).
You can read up on all of our shipping policies on the website. And remember, International only applies to customers outside of the US and Canada. Because (for now, at least) shipping to Canada doesn't cost much more than shipping across the country, we include Canada as "domestic"!