Section 8.19. PENALTY.  Any person, firm or corporation found guilty of the violation of any provision of this Chapter, shall, upon conviction thereof be subject to a forfeiture of not less than Twenty-Five ($25.00) Dollars nor more than Five Hundred ($500.00) Dollars, together with the costs of the action for each violation; and in default of payment thereof, shall be imprisoned in the County Jail or the House of Correction of Milwaukee County until said forfeiture and costs, together with subsequent costs, are paid, but in no event to exceed thirty (30) days.