Answer:
$18,400
Explanation:
Given that
Direct material = $10
Direct labor = $6
Variable overhead
= ($70,000 ÷ 10000 units)
= $7
Total  cost per unit of Finished Goods
= $23
So, the value of ending inventory under variable costing
= $23 × 800 units
= $18,400
Therefore we include Direct material per unit,  Direct labor per unit and  variable overhead per unit under variable costing.