One shirt (? 2lbs) costs 13.95 for shipping. (This is the cheapest offered) If you review their shipping policy/pricing you see that shipping is based on amount spent, not weight of package. If you purchase a $20 item, it will cost you 10.95 to have it shipped. Your item is actually 30.95
Many merchants offer free shipping over a certain dollar amount. TA increases your shipping, the more you spend.