There is a school manager who receives amounts of money assigned to certain activities but he takes some of them for himself

Q 3: I work as a school manager. Sometimes I receive amounts of money assigned to certain activities, such as the arts, sports and other activities, but I take a lot to myself and spend little of it (on the purposes assigned by the donors). I do not know exactly the amount I have taken; and now I repented. How can I discharge myself from this catastrophe?May Allah bless Your Eminence Shaykh, grant you long life in obeying Him, and make your last deeds the best. May peace and blessings be upon our Prophet Muhammad, his family and Companions.

A: Try hard to count the sums you took, and bring them back to the treasury of the school. If you fail to do this, you should pay them as Sadaqah (voluntary charity) to the poor with the intention of paying it on behalf of its donors. Moreover, you should repent to Allah (Exalted be He). May Allah forgive you, us and all of Muslims.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.