When it comes to grocery chains, Trader Joe's isn't your average Joe. With more than 400 stores nearly 40 states, the company offers upscale grocery fare such as health foods, organic produce, and nutritional supplements. To keep costs down, its stores have no service departments and average about 12,000-15,000 sq. ft. Trader Joe's stocks about 4,000 items, 80% of which are its own private...