A court, in rendering a judgment in an action brought pursuant to section 2b, shall order, as the court considers appropriate, reinstatement of the employee, the payment of back wages, full reinstatement of fringe benefits and seniority rights, actual damages, or any combination of these remedies. A court may also award the complainant all or a portion of the costs of litigation, including reasonable attorney fees and witness fees, if the court determines that the award is appropriate.