Just when you thought you made your last trip out to the mall or the shopping center this year, it's time for returnuary. According to the National Retail Federation, retailers estimate about 17% of their holiday sales will be returned this year. So, how do all those returns impact a store's bottom line.And what does it say about the consumer. Let's ask Bill Simon. He's the former president and CEO of Walmart US.Uh, Bill, it's great to see you. And um I guess stores are trying to really take advantage of th ...