What is the ruling on an employee using the computer and printer belonging to her workplace for personal purposes in exchange for money, while she purchases the paper? And what should the employee do with the excess money left by customers in the till or that they forgo?

It was previously mentioned that an employee's use of office tools is a deception and a betrayal of trust, and what arises from it is unlawful money. Deducting a percentage from this money does not make the act permissible, due to the sanctity of a Muslim's money. As for the money remaining with the accountant due to the accumulation of sums left by their owners, if the owners tell the accountant, "Take it," then this is an act of ownership from them to the accountant himself, and he has the right to dispose of it. However, if they do not say anything to him, then this is their right, and the rulings of lost property apply to it.