Shipping costs are noted in each tier.
Please make sure to include shipping in your backing. So for example, if you back at the single copy level, it's $15 + $3.50 shipping US or $5 shipping international. In other words, that level would cost a total of $18.50 for US/Canadian backers and $20 for international backers.
On the two copies of the game tier, shipping is only $3.50 US/Canada and $5 international for both decks. I've gone crazy with shipping generosity!
Why did I not add in the shipping costs into the cost of the tier? Good question!