The sheriff or friend of the court shall disburse the wages or salary of an employed prisoner for only the following purposes in the order stated:

    (a) Board of the prisoner;

    (b) Necessary travel expense to and from work and other incidental expenses of the prisoner;

    (c) Support of the prisoner's dependents, if any;

    (d) Payment, either in full or ratably, of the prisoner's obligations, acknowledged by him in writing, or which have been reduced to judgment;

    (e) The balance, if any, to the prisoner upon his discharge.