When a forfeiture is imposed, not exceeding a specific sum or when it is not less than one sum or more than another, the action may be brought for the highest sum specified, plus costs, fees, and surcharges imposed under ch. 814; and judgment may be rendered for such sum as the court or jury shall assess or determine to be proportionate to the offense.
Wis. Stat. § 778.06
When a city neither disputed its violation of an order nor denied that the state was entitled to a forfeiture to the extent of its violation of the order, it was error for the trial court to utilize this section to justify the imposition of a forfeiture less than the statutory minimum. State v. City of Monona, 63 Wis. 2d 67, 216 N.W.2d 230 (1974).