(b) Under the new ABC system, calculate the manufacturing cost per unit for the four jobs.

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Otherwise, she’ll call your competitor and offer it the same deal. Should you accept or decline her offer? Explain.
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(b) Under the new ABC system, calculate the manufacturing cost per unit for the four jobs.

Tom’s Manufacturing Company Ltd makes sophisticated custom parts on a job order basis. The company has two direct product cost categories: direct materials and direct labor. In the past, indirect manufacturing costs were allocated to products using a single indirect cost pool, allocated based on direct labor hours. The indirect cost rate was $ 230 per direct labor hour. The Manager (Mr. Bright) decided to switch from a manual system to software programs that release materials and signal machines when to begin working. Naturally thought was given to whether the existing costing would be suitable. After investigation, it was decided to adopt an activity based costing system. The manufacturing process has been organized into six activities, each with its own supervisor who is responsible for controlling costs. The following list indicates the activities, cost drivers and cost allocation rates.

Activity           Cost Driver Cost per unit of cost driver
Materials handling Number of parts $0.80
Milling Machine hours 40.00
Grinding Number of parts 1.60
Assembly Hours spent in assembly 10.00
Inspection Number of units produced 50.00
Shipping Number of orders shipped 3,000.00

The company’s information system automatically collects the necessary data for these activities. The data for the first four jobs were as follows:

Job81 Job82 Job83 Job84
Direct materials cost $19,400 $119,800 $9,700 $59,900
Direct labor cost $1,500 $22,500 $750 $11,250
Number of direct labor hours 50 750 25 375
Number of parts 1,000 4,000 500 2,000
Number of machine hours 300 2,100 150 1,050
Number of job orders shipped 2 2 1 1
Number of units 20 400 10 200
Number of hours in assembly 4 60 2 30


(a) Under the conventional system previously used, calculate the manufacturing cost per unit for job orders 81, 82, 83 and 84.

(b) Under the new ABC system, calculate the manufacturing cost per unit for the four jobs.

(c) Compare the cost per unit for the four job orders calculated under both methods. Explain why the cost per unit under the conventional costing system is different from cost per unit under the ABC system.

(d) Explain why the choice of cost drivers is critical in an ABC system.

(e) Identify and explain to Mr Bright the possible advantages and disadvantages of adopting the ABC system.

Summary of Question:

This question is basically belongs to Accounting as well as it explains about preparing a job order for a manufacturing unit. The calculations have been provided in the solution in detail.


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