5-Chapter 12 Montreal Inc. manufactures a single product. The standard cost per unit of product is as follows: Direct materials-3 kg of plastic at $5 per kilogram $15.00 Direct labour-3 hours at $10 per hour 30.00 Variable manufacturing overhead 12.00 Fixed manufacturing overhead 9.00 Total standard cost per unit $66.00 The master manufacturing overhead budget for the month based on the normal productive capacity of 30,000 direct labour hours (10,000 units) shows total variable costs of $120,000 ($4 per labour hour) and total fixed costs of $90,000 ($3 per labour hour). Normal production capacity is 30,000 direct hours. Overhead is applied based on direct labour hours. Actual costs for producing 11,000 units in November were as follows: Direct materials (34,000 kg) $153,000 Direct labour (32,000 hours) 352,000 Variable overhead 135,000 Fixed overhead 95,000 Total manufacturing costs $735,000 The purchasing department normally buys the quantities of raw materials that are expected to be used in production each month. Raw materials inventories, therefore, can be ignored. Instructions (a) Calculate all materials, labour, variable manufacturing overhead and fixed manufacturing overhead variances and indicate whether they are favorable or unfavorable. (14 marks) (b) Calculate the total overhead variance. (3 marks) (c) Calculate the overhead budget variance