How can one repent who took extra money from selling shoes without the knowledge of the shop owner, when he does not know the exact amount he took and fears confronting the shop owner?

If a worker takes extra money beyond the agreed price without the permission of the shop owner, this is considered consuming wealth unlawfully (eating money by falsehood) and treachery. He must repent and return the money to its owner, even if indirectly, for fear of exposure. If he does not know the exact amount, he should act based on his best estimation. It is not permissible to give this money in charity as long as its owner is known and it is possible to return it to him.