Hadlock Company, which has only one product, has provided the following data concerning its most recent month of operations: selling price $$91,$ units in beginning inventory $0,$ units produced $6,800,$ units sold $6,400,$ units in ending inventory $400,$ and variable costs as direct materials $$39,$ direct labor $$18,$ Variable manufacturing overhead $$4,$ variable selling and administrative $$8.$ Then fixed costs $,$ fixed manufacturing overhead $ $68,000,$ fixed selling and adminstrative $ $57,600.$ Questions $1.$ What is the unit product cost for the month under variable costing? $2.$ The total contribution margin for the month under the variable costing approach is$?3.$ What is the total period cost for the month under the variable costing approach? $4.$ What is the net operating income for the month under variable costing?