Jacarda Company makes a composting bin that is subject to wide seasonal variations in demand. Unit product costs are computed on a quarterly basis by dividing each quarter€™s manufacturing costs (materials, labour, and overhead) by the quarter€™s production in units. The company€™s estimated costs, by quarter, for the coming year are given below:

Management finds the variation in unit product costs to be confusing and difficult to work with. It has been suggested that the problem lies with manufacturing overhead, since it is the largest element of cost. Accordingly, you have been asked to find a more appropriate way of assigning manufacturing overhead cost to units of product. After some analysis, you have determined that the company€™s overhead costs are mostly fixed and therefore show little sensitivity to changes in the level of production.
Required:
1. The company uses a job-order costing system. How would you recommend that manufacturing overhead cost be assigned to production? Be specific, and show computations.
2. Recompute the company€™s unit product costs in accordance with your recommendations in (1) above.

Quarter Second First Fourth Third Direct materials... Direct labour Manufacturing overhead. Total manufacturing costs. Number of units to be praduced. Estimated unit product cost. $180,000 72,000 216,000 $468,000 60,000 $780 $120,000 48,000 204000 $372,000 40,000 $9.30 $ 60,000 $240,000 24,000 192,000 $276,000 20,000 $13.80 228,000 $564,000 80,000 $705