Torrid, why is your shipping so expensive?

So I have a bad habit of buying1 shirt a week. 1 shirt shipped has been $35 (I usually buy a graphic tee $28.50, 10% off coupon, and 5% diva discount).  

Shipping is $8 dollars!

Torrid sends 1 shirt in a small packet. Out of curiosity I weighed said shirt, it weighs 6 oz. Torrid sends MY 1 shirt via USPS first class mail.  

Do you know how much it costs to ship a 6 oz. package via USPS first class mail? 

$2.15  
(this is assuming they would be eligible for commercial rate)

No kidding, so Torrid is making quite a bit just on shipping alone. 

I do not understand why Torrid charges so much for shipping, when their sister store, Hot Topic charges a flat fee of $4.99! WTF Torrid. I know Torrid mirrors alot of the promos run on Hot Topic, why can't they mirror the shipping charges for Torrid?