Concept explainers
Activity-based department rate product costing and product cost distortions
Big Sound Inc. manufactures two products: receivers and loud-speakers. The factory
Indirect labor | $400,400 |
Cutting Department | 198,800 |
Finishing Department | 114,800 |
Total | $714,000 |
The activity base associated with the two production departments is direct labor hours. The indirect labor can be assigned to two different activities as follows:
Activity | Budgeted Activity Cost | Activity Base |
Setup | $138,600 | Number of setup |
Quality Control | 261,800 | Number of inspections |
Total | $400,400 |
The activity-base usage quantities and units produced for the two products follow:
Number o Setup |
Number of Inspections |
Direct Labor Hours—Subassembly |
Direct Labor Hours—Final Assembly |
Units Produced |
|
Snowboards | 430 | 5,000 | 4,000 | 2,000 | 6,000 |
Skis | _70 | 2,500 | 2,000 | 4,000 | 6,000 |
Total | 500 | 7,500 | 6,000 | 6,000 | 12,000 |
Instructions
1. Determine the factory overhead rates under the multiple production department rate method. Assume that indirect labor is associated with the production departments, so that the total factory overhead is 5420,000 and $294,000 for the Subassembly and Final Assembly departments, respectively.
2. Determine the total and per-unit
3. Determine the activity rates, assuming that the indirect labor is associated with activities rather than with the production departments.
4. Determine the total and per-unit cost assigned to each product under activity-based costing.
5. Explain the difference in the per-unit overhead allocated to each product under the multiple production department factory overhead rate and activity-based costing methods.
1.
Multiple production department factory overhead rate: This allocation method identifies different departments in the process of production. The factory overheads are allocated to products based on the overhead rate for each of the production departments.
Formula to compute multiple production department overhead rate:
Activity-based costing (ABC) method: The costing method which allocates overheads to the products based on factory overhead rate for each activity or cost object, according to the cost pooled for the cost drivers (allocation base).
Formula to compute activity-based overhead rate:
To compute: The multiple production department overhead rate for both departments
Explanation of Solution
Compute multiple production department overhead rate for subassembly department.
Compute multiple production department overhead rate for final assembly department.
2.
To compute: The factory overhead allocated to total and per unit of each product
Explanation of Solution
Compute total factory overhead and per unit overhead allocated for receivers.
Production Department | Multiple Production Department Overhead Rate | × | Total Number of Budgeted DLH | = | Factory Overhead |
Subassembly | $300 per DLH | × | 875 DLH | = | $262,500 |
Final assembly | $210 per DLH | × | 525 DLH | = | 110,250 |
Total factory overhead costs allocated for receivers | $372,750 | ||||
Number of units of receivers | ÷ 7,000 units | ||||
Factory overhead cost per unit of receivers | $53.25 |
Table (1)
Note: Refer to part (A) for value and computation of multiple production department overhead rate.
Compute total factory overhead and per unit overhead allocated for loudspeakers.
Production Department | Multiple Production Department Overhead Rate | × | Total Number of Budgeted DLH | = | Factory Overhead |
Subassembly | $300 per DLH | × | 525 DLH | = | $157,500 |
Final assembly | $210 per DLH | × | 875 DLH | = | 183,750 |
Total factory overhead costs allocated for loudspeakers | $341,250 | ||||
Number of units of loudspeakers | ÷ 7,000 units | ||||
Factory overhead cost per unit of loudspeakers | $48.75 |
Table (2)
Note: Refer to part (A) for value and computation of multiple production department overhead rate.
3.
To compute: The activity-based overhead rate for each of the given activities
Explanation of Solution
Compute activity-based overhead rates.
Computation of Activity-Based Overhead Rates | |||||
Activity | Activity Cost | ÷ | Total Activity-Base Usage | = | Activity-Based Overhead Rates |
Setup | $138,600 | ÷ | 400 setups | = | $346.50 per setup |
Quality control | 261,800 | ÷ | 2,200 inspections | = | $119 per inspection |
Subassembly | 198,800 | ÷ | 1,400 DLH | = | $142 per DLH |
Final assembly | 114,800 | ÷ | 1,400 DLH | = | $82 per DLH |
Table (3)
4.
To compute: The activity-cost per unit of the products
Explanation of Solution
Compute activity cost allocated per unit of receivers.
Activity | Activity-Based Overhead Rates | × | Actual Use of Activity-Base (Cost Driver) | = | Activity Cost Allocated |
Setup | $346.50 per setup | × | 80 setups | = | $27,720 |
Quality control | $119 per inspection | × | 450 inspections | = | 53,550 |
Subassembly | $142 per DLH | × | 875 DLH | = | 124,250 |
Final assembly | $82 per DLH | × | 525 DLH | = | 43,050 |
Total activity costs allocated to receivers | $248,570 | ||||
Number of units of receivers | ÷ 7,000 units | ||||
Activity-based overhead cost per unit of receivers | $35.51 |
Table (4)
Note: Refer to Table (3) for the value and computation of activity allocation rates.
Compute activity cost allocated per unit of loudspeakers.
Activity | Activity-Based Overhead Rates | × | Actual Use of Activity-Base (Cost Driver) | = | Activity Cost Allocated |
Setup | $346.50 per setup | × | 320 setups | = | $110,880 |
Quality control | $119 per inspection | × | 1,750 inspections | = | 208,250 |
Subassembly | $142 per DLH | × | 525 DLH | = | 74,550 |
Final assembly | $82 per DLH | × | 875 DLH | = | 71,750 |
Total activity costs allocated to loudspeakers | $465,430 | ||||
Number of units of loudspeakers | ÷ 7,000 units | ||||
Activity-based overhead cost per unit of loudspeakers | $66.49 |
Table (5)
Note: Refer to Table (3) for the value and computation of activity allocation rates.
5.
To discuss: The product cost distortion due to multiple production department overhead rate
Explanation of Solution
The product cost under multiple production department overhead rate approach and ABC approach are different. The product cost is distorted in multiple production department overhead rate approach. Although the time spent for subassembly and final assembly departments for loudspeakers and receivers is in the same ratio, but the setup department and quality control department are not accounted for in multiple department overhead rate method.
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Chapter 18 Solutions
FINANCIAL+MAGNAGERIAL ACCOUNTING LL
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