the best-before period

Recently, the trouble that a store sold food which is over the best-before period is increasing.They say "I thought it is O.K if customers eat this. "Now, I have a part time job at a convenience store Seven-eleven.When I meke "Oden", I put vegetables and meats which are processed into a pot. I have to check the best-before period. But, I always think "If I sell foods that are over the best-before period, customers are sure not to notice. Because, I can bring back these foods to home. Then, I eat them everyday. There are no trouble.But, new foods are more delicious than these old one. So, I think it is bad to sell old foods. Stores must keep the confidence in customers.It is most inportant not to make too much foods to decrease foods that connot be sold.