Answer:
Unitary variable cost= $95
Step-by-step explanation:
Giving the following information: 
Direct labor $ 40 per unit 
Direct materials $ 33 per unit 
Variable overhead $ 22 per unit
The variable costing method incorporates all variable production costs (direct material, direct labor, and variable overhead).
Unitary variable cost= 40 + 33 + 22
Unitary variable cost= $95