If a doctor analyzes his own sample in a government laboratory and then wishes to pay for the analysis, does he pay at the current price of the analysis or at its price at the time the analysis was performed?

An employee is entrusted with what is under their authority, and it is not permissible for them to use work tools for personal purposes, because it is an infringement on the rights of others. Whoever uses work equipment for personal purposes must repent by returning the right to its owners, which is the value of their benefit from the equipment, i.e., the fair rental value for the period of use.