Managerial accounting. please help ASAP.

Aaker Corporation, which has only one product, has provided the following data concerning its most recent month of operations: Selling price.. $99 Units in beginning inventory. Units produced Units sold......... Units in ending inventory 0 6,300 6,000 300 Variable costs per unit: Direct materials Direct labor. Variable manufacturing overhead Variable selling and administrative. $12 $42 $6 $6 Fixed costs: Fixed manufacturing overhead. Fixed selling and administrative.. $170,100 $24,000 The total contribution margin for the month under variable costing is: $72,000 $27,900 $234,000 $198.000 The total gross margin for the month under the absorption costing approach is: $98,100 $198.000 $72,000 $12,000 What is the total period cost for the month under the absorption costing? $170,100 $60,000 $230,100 $24,000 Under variable costing, the total amount of fixed manufacturing costs in the ending inventory would be? a) $0 b) $8,100 c) $8,505 d) $18,000 What is the net operating income for the month under absorption costing? $3,900 $(14,100) $12,000 $8,100