Advertising costs for the stereo system will be RM8,500 per month. The factory building depreciation expense is RM7,200 per year. Property taxes on the factory building will be RM9,000 per year. Required a) Use the provided answer sheet. Classify these costs into two ways (1) product cost (either as direct materials, direct labour or manufacturing overhead) or period cost and (2) variable cost or fixed cost with respect to the number of unit produced or sold. For classifying whether product cost or period cost, place the dollar amount (in monthly amount) in the appropriate headings. For classifying whether variable or fixed, please use X in the appropriate headings. b) Compute the average product cost of stereo system. c) Assume that for the next month production increases to 1,500 stereo systems. Would you expect the average product cost per stereo system increase, decrease or remain unchanged? Explain. d) One of the above cost items is a sunk cost. Identify and explain why it is a sunk cost.