Actual data Production 56,000 units Sales 53,000 units at 695 per unit Closing inventory 20,000 kg Variable overhead E502,000 Fixed overhead 82,500 hours at $10 per hour Labour 83,000 hours for $180,000 in total Materials purchases 130,000 kg Materials purchase price E2,700,000 Budgeted data Production 55,000 units Sales 50,000 units $100 per unit Variable overhead 82,500 hours (6 per hour Fixed overhead 6935,000 Materials 110,000 kg at (20 per kg Labour 82,500 hours at $2 per hour REQUIRED: (a) Calculate each of the following. (i) Materials usage variance (ii) Labour efficiency variance (iii) Variable overhead expenditure variance (iv) Variable overhead efficiency variance