Practicing to reduce greed

Once, after we left a store. I checked the receipt and found that they didn’t charge one $40 item.  The next day, I went back to the store and told the salesgirl, and they charged it. 

A few times, I checked store receipt and found a price was wrong, over charge or double the item. I didn’t go back to ask for money back.    

 
有一次，離開商店后，我才檢查單據時發現少計了約四十多美金的一項價款。隔天再去時，我告訴那店員，給她補計了。
有幾次，檢查商店單據時，發現價不對多計或計重複。也沒去要錢回了。