Answer:
$67,500 U
Step-by-step explanation:
$67,500 U (The Variable overhead efficiency variance = (10,125 – 9,000) × $60 = $67,500 U)
(while the Variable overhead efficiency variance = {the Actual quantity of variable overhead cost-allocation base used for real output – Budgeted quantity of variable overhead cost- allocation base allowed for actual output} × Budgeted variable overhead cost per unit of cost-allocation base)