View Policies Current Attempt in Progress Tamarisk Company's overhead rate was based on estimates of $181,200 for overhead costs and 18,120 direct labour hours. Tamarisk's standards allow 2 hours of direct labour per unit produced. Production in May was 840 units, and actual overhead incurred in May was $19,000. The overhead budgeted for 1,680 standard direct labour hours is $16,290 ($4,530 fixed and $11,760 variable). (a) Calculate the total, budget, and volume variances for overhead. Total overhead variance $ Overhead budget variance $ Overhead volume variance $ Unfavourable Neither favourable nor unfavourable Favourable