Standard markups are 100%. So if it costs you $25 to make a shirt, you sell it for $50. Keep in mind, however, that your retailer will do the same, so if you sell it to them for $50, they'll be selling for $100. It'll be up to you whether you can lower your price or not in order to keep the final retail value reasonable.
BTW what kind of shirts are you making? $25 is RIDICULOUSLY high to make a t-shirt, unless it's more than just plastisol on a cotton shirt?
BTW what kind of shirts are you making? $25 is RIDICULOUSLY high to make a t-shirt, unless it's more than just plastisol on a cotton shirt?