The judge of probate shall charge and collect an additional fee of one dollar ($1) for each motor vehicle license tag or decal issued by mail. This fee shall be paid with the mailed request for license tags or decals. Such additional fee shall be paid by the judge of probate into the county general fund, and the actual expense of mailing application forms to the owners of motor vehicles and of mailing tags or decals as hereinabove provided shall be paid from the county general fund, and approved as provided by law. In addition the mailing fee may be adjusted from time to time by the Escambia County Commission as may be necessary to cover the actual costs of mailing the tags or decals.