A fierce look has little to do with luxury designers and their exorbitant price tags. Yulia-Images/Moment via Getty Images Strutting down the catwalk in a Cindy Castro frock, 37-year-old Amazon worker Samari Jomar Mercado looked like an ethereal punk-rock fairy: sleeve tattoos, lace bag on her wrist and a white ribbon billowing from her nape like a flag. After a dramatic pivot and pit pose, she paused to salute her rapturous crowd. “For years she worked 10 hours a day, six days a week … lifting