How can one pay for what was consumed of goods (Ramadan dried fruits and nuts) from a former workplace whose owner cannot be reached, knowing that this consumption occurred secretly and in violation of work regulations?

What was taken from the store without right must be returned, and there is no need to reach its owner. It is sufficient to return the equivalent by any means that does not cause harm or embarrassment. The original principle is to return the like, and if that is not possible, then its value in money should be returned. The most cautious approach is to calculate the higher value, whether it was on the day of damage or the day of return.