Any person convicted of a violation of any ordinance of the city may be fined in a sum not to exceed three hundred dollars ($300.00) for any offense and such person may be confined in a jail for a period of not more than thirty (30) days. Either or both such fine and imprisonment may be imposed; and in addition thereto, any person so convicted shall pay such costs as the court may assess. (Ord. 308 § 1, 1981)