No different than anywhere else. At lowes I often get charged wrong for lumber. They charge 8 ft price for 10 ft board or 1/2 price for 3/4 plywood. I have seen lots of times where a person buys ammo and gets wsm or wssm instead of win, or 25-06 rather than 30-06, 357 mag rather than 357 sig...it's inattention to detail costing retailers and often customers lots of money. The problem I saw recently at walmart self checkout was interesting. Guy pushes a cart to the self checkout and goes to scanning his groceries. Has a 50 ish inch TV as well. Types in upc from dogfood or something else to get his 400 dollar TV for 20 bucks...he was escorted out the door in cuffs. Again, it's attention to detail, no telling how much money was lost before they figured this guy out or how many times he had gotten by with it. Retailers need to pay more attention to what they are selling to verify that people are getting what they want and paying for it appropriately.