In almost every city or large town， you can find several big-chain supermarkets. They have more than a dozen checkouts6 and are one-stop shops7 since you can buy almost everything there： food， cosmetics8， clothes， medicine， etc. You name it. With the development of technology， some of these supermarkets have installed the automatic checkout lanes for customers. I was so thrilled9 the first time I used the automatic checkout lane. Most packaged goods have barcodes10 and you just scan them on the scanning machine when you check out. Some items， such as produce11 （vegetables and fruit）， do not have barcodes on them. You need to input their label numbers， which can be found on the list glued to the scanning machine. These automatic checkout lanes help the stores reduce their labor cost and increase their efficiency.
Every grocery store has promotions12 on different kinds of products every week. Usually you can find a store weekly newspaper with featured promotions for that particular week. I am a bargain13 hunter14， forward-buying a lot of daily products if I feel I need them in the future. Once， I saw a featured promotion on Panteen 2-in-1 shampoo plus conditioner15. Although I did not need it at that time， I felt it was a great deal. So I decided to buy 2 bottles. However， I could not find any such Panteen on the shelf. I went to a sales clerk and asked if he could find any for me. He told me that the store was out of the stock and it would not have any in until the next week. The unfortunate thing was that by then the promotion would be over. However， the clerk told me that I could go to the customer service counter and I would be given a rain check16， which would guarantee the promotion price for me on that particular item. In the following week， with the rain-check， I bought the products at the last week's promotion price.
Another time， I bought two bags of salad at a grocery store. When I scanned them， the screen showed a different price from what the store advertised. Out of curiosity， I went to the customer service counter and asked why. The lady who helped me went to the shelf to double-check17 the price. When she came back， she apologized to me， saying that the store did not scan the price properly. According to the internal policy of the store， if the customer found out a scanning problem， he would get the product for free as an award for him or a penalty to the store. When I left the store with the two bags of free salad， I marveled at18 the honesty of the store clerk. If she had not told me， I would never have had any chance to know that the store had this internal policy.
A shopping mall in the States is composed of many individual specialty shops and nationwide chain stores， such as Sears and JC Penny. What impresses me most when shopping at the mall is its return policy . No matter what you buy， shoes， pants or big-ticket items such as TV and VCR， if you find some problems with them or simply do not like them any longer， you can return them within 30 days. You won't be challenged at the customer service counter as long as you have your receipt. Of course there are some people who might take advantage of this return policy， especially when they need something for a momentary use. That's why you can always find a long line of people waiting to return their goods right after Christmas.
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