Answer:
Variable overhead rate variance = Actual Variable overhead incurred - Actual Hours of Input, at Standard Rate
Variable overhead rate variance = ($4.5*18800 - $77,700)
Variable overhead rate variance = $6,900 Favorable
Variable overhead efficiency variance = Actual Hours of Input, at Standard Rate - Standard Hours allowed for Actual Output at Standard Rate
Variable overhead efficiency variance = (12000*1.5 - $18,800)*$4.5 =
Variable overhead efficiency variance = $3,600 Unfavorable
Variable overhead cost variance = Actual Variable overhead incurred - Standard Hours allowed for Actual Output at Standard Rate
Variable overhead cost variance = (12000*1.5*$4.5) - $77,700
Variable overhead cost variance = $3,300 Favorable