can someone please help me with this. how can you calculate sales since we dont know unit selling price? thankyou in advance

Determine ending inventory E6-18 Langdon Company produced 9,000 units during the past year, but only 8,200 of the under variablecosng andere sold. The following additional information is also available. determine whether ahsorption or variable costing would result in higher net income. Direct materials used Direct labor incurred Variable manufacturing overhead Fixed manufacturing overhead Fixed selling and administrative expenses Variable selling and administrative expenses $79,000 $30,000 $21,500 $45,000 $70,000 $10,000 LO 5), AN There was no work in process inventory at the beginning and end of the year, nor did Langdon have any beginning finished goods inventory. Instructions (a) What would be Langdon Company's finished goods inventory cost on December 31 under variable costing? (b) Which costing method, absorption or variable costing, would show a higher net income for the year? By what amount