Answer:
Total Variable overhead variance $30,000 Unfavorable
Step-by-step explanation:
Standard variable overhead per unit
= $2 per hour × 10 hours per unit
= $20 per unit
$
18,000 units should have cost (18,000× $20 per unit) = 360000
but did cost 390,000
Total Variable overhead variance 30,000 Unfavorable