Indigo Company applies overhead based on direct labour hours. Two direct labour hours are required for each unit of product. Planned production for the period was set at 8,600 units. Manufacturing overhead is budgeted at $120,400 for the period (20% of this costis fixed). The 16,470 hours worked during the period resulted in the production of 8,100 units. The variable manufacturing overhead cost incurred was $98,100 and the fixed manufacturing overhead cost was $28,600. (a) Calculate the variable overhead spending variance for the period, Variable overhead spending variance $ Calculate the venable overhead spending variance for the period. Variable overhead spending variance Calculate the variable overhead efficiency (quantity) variance for the period. Variable overhead officiency variance Calculate the fixed overhead budpet (spending) variance for the period Piret overhead budget variance Calculate the fixed overhead volume var variance for the period und overend volume verance