BreathingShadow: Yes, you have to add the postage to the final amount. There in the lower right corner of the order-thingie are the postage prices for the most common combinations.
1 shirt plus 1 CD is unfortunately not covered in the examples, so you can gather it must be either 8 or 11 Dollars (the nearest examples to what you bought). You´ll have to ask Dan for the exact price, or maybe he writes it here in the forum, how much it would be.