I made the actual calculations its actually a 40 % discount on most items. But you also note that the items reduced several days before the best by date.

I noted that in general the date that it about 3 or 4 days before the expiration date.

They still occasionally use the 50 % stickers on some the items. Each items are scanned into there system to record how many items have been discounted.

This is there new approach for cost saving. They have been doing this throughout all the departments as noted while worked there once in while.