When you buy a jug of mayonnaise or a mammoth pack of toilet paper rolls at Costco, you understand that you’re saving by buying in bulk. But then there are the $4.99 rotisserie chickens that you don’t have to buy by the dozen to get that low price. In fact, Costco is the one getting the short end of that deal, missing out on millions a year by keeping the price low. [More]
