Production Sales Closing inventory Variable overhead Fixed overhead Labour Materials purchases Materials purchase price Actual data 56,000 units 53,000 units at 95 per unit 20,000 kg 502,000 82,500 hours at 10 per hour 83,000 hours for 180,000 in total 130,000 kg 2,700,000 Production Sales 50,000 units Variable overhead 82,500 hours Fixed overhead Materials 110,000 kg at Labour Budgeted data 55,000 units 100 per unit 6 per hour 935,000 20 per kg 82,500 hours at 2 per hour REQUIRED: (a) Calculate each of the following. (1) Materials usage variance (ii) Labour efficiency variance (iii) Variable overhead expenditure variance (iv) Variable overhead efficiency variance