Question 3 (20 marks) Wifi Digital Corp produces digital transmitters for use in normal environmental conditions. Recently it introduced a special model which is intended for use in extreme and more difficult environments. Since its introduction, sales of the special model have been strong but overall company profits have declined steadily. The company currently assigns manufacturing overheads to products based on direct labour costs. Material and labour costs for last month were as follows: Direct materials Direct labour Normal model $280,000 $330,000 Special model $240,000 Total $520,000 $170,000 $500,000 Last month manufacturing overheads were $400,000 based on the production of 7,200 units of the Normal model and 2,400 units of the Special model. Company management thinks that the current method of costing may not be accurate and wonders if using activity-based costing (ABC) could help to cost its products more accurately. Company management recently hired a consultant who discovered that overhead costs could be separated into three core activities. These activities, and their costs and cost drivers for last month, are summarised in the table below: