I just got into Sales job and my new employer hand me two black shirts w/ small company logo (purple&yellow) on the left side chest. They will be my working shirts and he asked me to wear dark pants/jeans with dark shoes... as long as I look professional not sloppy. I will be working in the shopping centers, face2face customer service and sales. We buy golds. I don't want to look like high end jewelry salesperson, I want to archive business casual look. Any idea what should I be wearing with my black colored logo shirts?? Please help since I am new.