I need ethical help !!

All big corporations calculate that a certain percentage of their stock will be wastage for whatever reason. I used to be head storeman for an electrical components company. The stock figures I had in the warehouse never matched what was in head office. But no one really cared. Large supermarket chains dump stock in the skip that even shows slightest damage to the cardboard boxes though the products inside are in perfect condition. That may be hundreds of boxes of perfectly good products every day. In the end this wastage is factored in to the costs consumers pay. No ethical problem here for you. You got lucky.