Section 2.15    GENERAL PENALTY.  Any person, firm or corporation found guilty of the violation of any provision of this Chapter, unless another penalty is therein provided, shall be subject to a forfeiture of not less than Ten ($10.00) Dollars nor more than Two Thousand ($2,000.00) Dollars together with the costs of the action; and in default of payment thereof, shall be subject to imprisonment in the County Jail or House of Correction of Milwaukee County until such forfeiture and costs, together with any subsequent costs have been paid, but in any event, not to exceed ninety (90) days.  Each day a violation continues constitutes a separate offense.