Shamrock Company uses a standard cost system. Indirect costs were budgeted at $198,000 plus $15 per direct labour hour. The overhead rate is based on 9,900 hours. Actual results were: Standard direct labour hours allowed 8,500 Actual direct labour hours 9,900 Fixed overhead $188,600 Variable overhead $185,200 (a) Your answer is partially correct. Calculate the fixed overhead production volume variance. Fixed overhead production volume variance $ Unfavourable Calculate the variable overhead spending variance. Variable overhead spending variance $ Calculate the variable overhead efficiency variance. Variable overhead efficiency variance $ Calculate the over- or underapplied overhead