Managerial accounting please help

Hannibal Steel Company has a Transport Services Department that provides trucks to haul ore from the company's mine to its two steel mills-the Northern Plant and the Southern Plant. Budgeted costs for the Transport Services Department total $210, 600 per year, consisting of $0.16 per ton variable cost and $160, 600 fixed cost. The level of fixed cost is determined by peak-period requirements. During the peak period, the Northern Plant requires 70% of the Transport Services Department's capacity and the Southern Plant requires 30%. During the year, the Transport Services Department actually hauled the following amounts of ore for the two plants: Northern Plant, 116,000 tons; Southern Plant. 63, 900 tons. The Transport Services Department incurred $355,000 in cost during the year, of which $52, 600 was variable cost and $302, 400 was fixed cost. Required: Determine how much of the $52, 600 in variable cost should be charged to each plant. Determine how much of the $302, 400 in fixed cost should be charged to each plant. Should any of the $355,000 in the Transport Services Department cost not be charged to the plants