A t-shirt for over $60? 
You have to reprice your products.
i indeed agree with TommyBitcoin , and by the way , mutlipling threads on threads all over this forum wont get help you to sold more of your shirts at this kind of prices.. even with spreading few "promo codes" or claiming they are good cotton quality..You have to reprice your products.
And by the way, stop thinking in dollar terms and start thinking in btc terms.
It's not the cost of my t-shirts going up, it's the dollar going down...
;-)
V.