I'm not sure about the old days, but I believe Costco has stated they cap their markup at 15% -- which along with membership fees pays for employee salary, oper

I'm not sure about the old days, but I believe Costco has stated they cap their markup at 15% -- which along with membership fees pays for employee salary, operations, and profit. I'm guessing that's overall and some products are more profitable while others (like their rotisserie chicken) are subsidized.