(a) If the person holding a sale is a commissioner specially appointed or a trustee in a deed of trust, the judge or clerk of court having jurisdiction shall fix the amount of his compensation and order the payment thereof out of the proceeds of the sale.
(b) If the person holding a sale is any other person, the judge or clerk may, but is not required to, fix his compensation and order the payment thereof out of the proceeds of the sale; when compensation is not fixed in this manner, compensation may be fixed and paid in the usual manner provided with respect to such fiduciary for receiving and disbursing funds.