Last reviewed: May 2009 
  This article is the archived  version of a report that appeared in May 2009 Consumer  Reports Magazine. 
 Think of supermarkets as giant selling  machines, where traffic patterns, product placement, smells, displays, and signs  lure you to spend more time cruising the aisles and more money at the checkout.  These tips should keep you from falling for the tricks: 
 Look high and low
 Supermarkets are in the  real-estate business, and prime selling space includes the middle or eye-level  shelving. Vendors sometimes pay retailers hundreds, even thousands, of dollars  in slotting fees to take on new products or display products prominently. There  are differing schools of thought on slotting fees, with critics contending that  they stifle competition and boost prices. In any event, check whether similar  products on top or bottom rungs are less expensive. 
 Eye end caps
 Some shoppers assume that  products on aisle ends are on sale, which is why those displays can boost sales  by a third. But end caps can highlight items about to expire or those that  aren't a bargain. At an A&P near our Yonkers, N.Y., headquarters, we spotted  an end cap loaded with Pepperidge Farm cookies, all at full price. The end-cap  tie-in is another trick: Related items are featured, not all of them on sale.  Take the Tostitos display we saw at Stop & Shop. The chips were on sale;  salsa and dips weren't. 
 Compare unit prices
 Only a few states and metro  areas have laws requiring price tags on every item. Elsewhere you'll typically  find shelf tags under each product that reveal the cost per ounce, quart, pound,  or 100 sheets. To see whether big packages really are cheaper, compare the unit  price. We found many instances in which bigger wasn't better. At a ShopRite, for  example, we eyed a 14-ounce box of Frosted Flakes on sale at $2.29 per pound  compared with $4.38 per pound for a 17-ounce box. 
 Consider organics sometimes
 Organic means expensive, so  buy organic versions of produce that's most likely to harbor pesticides when  grown conventionally, such as peaches, strawberries, and bell peppers. Organic  meats and dairy foods might be worthwhile but not "organic" seafood because  standards aren't in place. (Always cook meat thoroughly to avoid pathogens.)  
 Weigh the cost of convenience
 Is it that much work to cut  up carrots, celery, lettuce, and cheese? During one of our many shopping trips,  we spotted a 6-ounce bag of shredded carrots for $1.50, almost five times as  much, on a unit-cost basis, as a bag of whole carrots. 
 Avoid checkout temptations
 Snacks at the checkout look  more appealing the longer you're in line. But they're overpriced. At a Stop  & Shop, a chilled 20-ounce Coke was $1.49 at the register. In the beverage  aisle, a six-pack of slightly smaller bottles cost $3.33 on sale—about 66 cents  per 20 ounces. For that much savings, you might want to wait until you get home  and add ice. 
 Go deep
 Retailers regularly rotate  stock so that you see the oldest milk, cereal, cold cuts, and other packaged  goods first; the newest stuff is pushed to the back. To get the longest shelf  life from the food you've bought, burrow to the rear of the shelf, refrigerator,  or freezer. 
 Read flyers carefully
 Three-quarters of people we  surveyed rely on weekly circulars to find out what's on sale. That helps explain  why the mere mention of a product in a flyer can send sales soaring by as much  as 500 percent, even without a price reduction. Manufacturers might have paid  for placement in the ad. Don't assume featured products are on sale. 
 Watch for sneaky signs
 Many sales tempt you to buy  more than one bag or box—by touting, for example, four boxes of cake mix for $5.  But rarely are you required to buy all four to get the discount. Retailers are  just planting a number in your head, hoping you'll buy a lot. 
 Look at the location
 The same food might be sold  in several places throughout the store. At Stop & Shop, "premium"  store-brand Swiss cheese was on sale at the deli for $6.99 per pound with a  bonus card. In the refrigerated case, the same sliced Swiss was $5.58 per  pound—no card necessary. A chunk of the same cheese was $4.69 per pound, also  without a card. 
 Buy at the bakery
 More and more supermarkets  sell store-made baked goods, often for less than the commercial alternatives. At  ShopRite, six hot-from-the-oven rolls cost $1.99; a packaged half-dozen  from Freihofer's cost $3.19. 
 Check the receipt
 In our 2008 survey, 6  percent of respondents said that they were overcharged at the register. That's  in line with what readers told us in 2005. Both surveys also revealed that no  chain stood out as particularly accurate or inaccurate. Many chains will give  you the item free if it scans at the wrong price, but the onus is on you to  point out the error. 
 Buy bagged produce
 Some produce is much cheaper  by the bag than by the pound. A ShopRite recently offered a 5-pound sack of  potatoes for $2.99, compared with 99 cents per pound for loose ones in a bin. If  the product has a long shelf life, bagged produce is a better buy, unless, of  course, the only alternative is the 20-pound behemoth at Costco.