The Porter Corporation produced 4,400 units this period with the following activity Material was purchased: 12,500 metres for $215,000 ($17.20 per metre). 10,400 metres of material was used in production. Direct labour was worked: 16,500 direct labour hours (DLH) at a cost of $251,625 ($15.25/DLH) The company has the following per unit standards: Direct materials: 2.5 metres @ $16.50 per metre Direct labour 4 hours @ $14 per hour Required: 1. Calculate the material and labour variances for the month. (12 marks) Show calculations and label variances (name of variance and favourable or unfavourable). 2. Assuming standards are correct, identify one possible cause (reason) for any one unfavourable variance calculated in Part 1 (state which variance) (1 mark)