It is important to keep an eye on the register as you are checking out, not only in grocery stores, but in all stores. Many stores have what they call, POS sales, or point-of-sale markdowns, that are automatically loaded into the store's register systems. Sometimes, not all of the markdowns make it into the system. This is why many pricing errors occur and the cashier will not realize it because they are not in the position to know each price of every item. Consumers who take the time to watch as their transaction is being rung up will save themselves money and the hassle of trying to recoup their money on incorrectly priced items later.
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Once the transaction is completed, take a minute to look at your receipt to make sure nothing odd catches your eye. Lastly, count the change you are given, in front of the cashier, so that discrepancies can be quickly corrected.
