They have already been charged for and was shipped all the way to the store which probably isn't cheap, no way are they taking it back without some sort of charge and that is if the supplier agrees to it otherwise there is a possibility they take it back and keep the charge on the books as they technically fulfilled their end of the deal, but it all depends on what the terms are for their contract. Case around that time was probably around $20, so probably around $1,500 mistake, if it happens often it would hurt them finically, but as a rare mistake, it's a drop in the bucket, it would be like the average person giving a cashier an extra $10 bill. A lot of these stores throw out and/or donate lots of food as is, half the food we produce in the US gets thrown out