Grayson Industries has collected the following data for one of its products: Direct materials standard (5 kilograms per unit @ $0.50/kg.) Direct materials flexible budget variance-unfavourable $2.50 per finished good $10,000 Actual direct materials purchased and used Actual finished goods produced How much is the direct materials efficiency variance at Grayson Industries? 1) $12,000 favourable 2) $10,000 unfavourable 3) $12,000 unfavourable 4) $10,000 favourable 100,000 kilograms 24,000 units