Costco's principles are rather plain and simple. They stand apart from other major retailers by keeping costs down and passing those savings on to their members. "Our large membership base and tremendous buying power, combined with our never-ending quest for efficiency, result in the best possible prices for our members. By carefully choosing products based on quality, price, brand, and features, the company can offer the best value to members." And as Costco's founder, Jim Sinegal, puts it, "It doesn't do Costco any good if nobody can afford to buy anything." So when answering this question, showcase how familiar you are with Costco and what they pride themself on.