Traditional vs. ABC Costing - Cost Accounting

1. Based solely on this information, what is the total overhead allocated to Gizmos under each system?
   Answer: Traditional: $280,000; ABC: $320,000 The key principle is that the total overhead to be allocated is the same regardless of the allocation method used. The costing system only changes how that total amount is distributed among the products. The allocation is a zero-sum game between the products. * Traditional System Allocation for Gizmos: Total Overhead - Overhead for Widgets = Allocation for Gizmos $500,000 - $220,000 = $280,000 * ABC System Allocation for Gizmos: Total Overhead - Overhead for Widgets = Allocation for Gizmos $500,000 - $180,000 = $320,000
2. In selecting the more appropriate cost driver for the Production Scheduling pool to improve costing accuracy over the traditional system, which factor is most critical?
   Answer: The driver that best establishes a cause-and-effect relationship with the costs incurred in the scheduling activity. The primary goal of ABC is to improve the accuracy of cost assignments. This accuracy is achieved by identifying the underlying cause of a cost being incurred. The best cost driver is the one that has the strongest cause-and-effect relationship with the costs in the activity pool. For Production Scheduling, the number of production runs is likely a better cause-and-effect driver than direct labor hours, because each run requires a new schedule regardless of the labor hours within that run. While ease of measurement (A) is a practical concern, it is secondary to accuracy. Low correlation (B) is a likely outcome but not the goal itself. Allocating cost to a specific product (D) is not the objective; the objective is an accurate allocation regardless of the outcome.
3. A manufacturing company finds that after implementing ABC, the cost difference between its simplest and most complex products increased from 15% under traditional costing to 45% under ABC. What does this indicate about the previous costing system?
   Answer: Traditional costing was understating the resource consumption differences between simple and complex products The increased cost spread under ABC (from 15% to 45%) indicates that complex products consume significantly more resources than traditional costing captured, while simple products consume less. Traditional volume-based allocation was averaging costs and understating the true differences. Complex products likely consume more batch-level and product-level activities that ABC properly assigns. A is wrong because traditional costing underestimated differences. C assumes ABC errors without evidence. D misunderstands that smaller variations don't indicate accuracy—ABC's larger spread likely reflects reality.
4. If Standard chairs are allocated 60% of assembly costs but only 20% of design costs under ABC, while representing 70% of total direct labor cost, what does this suggest about the cost accuracy under each system?
   Answer: Traditional costing overstates Standard chair costs because labor cost doesn't reflect the design-intensive nature of furniture production Standard chairs get 70% of overhead under traditional costing (70% of direct labor cost) but under ABC they get less design cost (20% vs 70%) and more assembly cost (60% vs 70%). Since design is expensive ($80,000) and Standard chairs use little design, traditional costing overstates their costs by allocating design costs based on labor rather than actual design consumption. The assembly allocation difference is smaller and doesn't offset the design misallocation. B is incorrect because assembly consumption (60%) is less than labor allocation (70%). C and D misinterpret the cost accuracy implications.
5. Which statement most accurately describes the cost distortion created by the traditional system?
   Answer: It over-allocates batch-level and product-sustaining costs to Product A, effectively subsidizing Product B. The traditional system uses a unit-level driver (machine hours) to allocate all overhead. This works reasonably well for the 30% of costs that are truly unit-level. However, it completely misallocates the 70% of costs that are batch-level and product-sustaining. These costs are allocated based on volume (machine hours). Product A has high volume, so it is assigned a large share of the setup and engineering costs, even though it consumes very little of these resources. Product B has low volume, so it is assigned a small share of these costs, despite being the primary driver of them. This means Product A is overcosted (and subsidizes Product B), while Product B is undercosted.
6. If the company were to use a traditional costing system with machine hours as the single allocation base, the reported overhead cost per unit for Product P would be:
   Answer: $22 lower than the ABC cost. This requires calculating the cost under both systems and comparing them. 1. Calculate ABC Overhead Cost for Product P: * Total Engineering Hours = 3,000 + 1,000 = 4,000 * Engineering Rate = $200,000 / 4,000 hours = $50 per eng. hour * Total Machine Hours = 10,000 + 30,000 = 40,000 * Machine Processing Rate = $400,000 / 40,000 hours = $10 per mach. hour Total ABC Overhead for P = (3,000 eng. hrs $50) + (10,000 mach. hrs * $10) = $150,000 + $100,000 = $250,000 * ABC Overhead per unit of P = $250,000 / 5,000 units = $50 2. Calculate Traditional Overhead Cost for Product P: * Total Overhead = $600,000 * Total Machine Hours = 40,000 * Traditional Rate = $600,000 / 40,000 MH = $15 per MH Total Traditional Overhead for P = 10,000 MH $15/MH = $150,000 * Traditional Overhead per unit of P = $150,000 / 5,000 units = $30 3. Compare the Costs: * The traditional cost per unit ($30) is $22 lower than the ABC cost per unit ($50).
7. If ABC allocates 15% of Programming costs, 80% of Customer Support costs, and 90% of Product Customization costs to Enterprise, how much will Enterprise's overhead cost per programmer hour change compared to traditional costing?
   Answer: Enterprise's overhead cost per programmer hour will increase by approximately $200 under ABC Traditional: Enterprise gets 2,000 hours × $150 = $300,000. ABC: Enterprise gets Programming (15% × $800,000 = $120,000) + Customer Support (80% × $400,000 = $320,000) + Customization (90% × $300,000 = $270,000) = $710,000 total. Per programmer hour: $710,000 ÷ 2,000 = $355. Increase: $355 - $150 = $205 ≈ $200. This reflects Enterprise's high consumption of support and customization activities not captured by traditional programmer-hour allocation. A, B, and D represent calculation errors or misallocation of activity costs.
8. Under which of the following conditions would the product costs calculated using a single, plant-wide overhead rate be most similar to the costs calculated using an activity-based costing system?
   Answer: When a single, volume-based activity is the primary cause of overhead costs and all products consume resources in similar proportions. The fundamental premise of ABC is that different products consume different activities in different proportions. If, however, a company's overhead is almost entirely driven by one single volume-based activity (like machine hours), and all products use this activity in similar proportions, then a traditional system using that same activity as its allocation base will produce results very close to an ABC system. ABC provides the most benefit when there is significant product diversity and a complex overhead cost structure, so the absence of these conditions leads to minimal difference between the two methods.
9. A manufacturing company with significant product diversity is considering a switch from a traditional costing system, which uses a single plant-wide overhead rate based on direct labor hours, to an activity-based costing (ABC) system. Which of the following products would most likely experience the largest decrease in its reported manufacturing cost after the switch?
   Answer: A high-volume product that is produced in long runs and has a simple, standardized design. Traditional costing systems using a volume-based driver like direct labor hours tend to overcost high-volume, simple products. This is because these products are assigned a large share of total overhead based on their high volume (e.g., many labor hours), but they do not consume a large share of batch-level or product-sustaining costs (like setups or complex engineering). ABC corrects this by tracing those non-volume-related costs to the products that actually consume them (the low-volume, complex ones). Therefore, the high-volume, simple product's reported cost will decrease as it is relieved of the burden of subsidizing the more complex products.
10. Given this information, what was the total manufacturing overhead for the period, and what is the most reasonable conclusion about the cost accuracy?
    Answer: Total overhead is $260,000; the traditional system likely overcosts Product A and undercosts Product B. First, calculate total overhead from the traditional allocation: (10,000 units A $20/unit) + (2,000 units B $30/unit) = $200,000 + $60,000 = $260,000. Second, analyze the cost distortion. Product B, a low-volume product, consumes 80% of the batch-driven setup costs. A traditional system using a volume-based driver (machine hours) will not capture this. It will average the high setup costs across all units, effectively shifting cost from the low-volume, high-setup product (B) to the high-volume, low-setup product (A). Therefore, the traditional system overcosts Product A and undercosts Product B.
11. Compared to a more refined costing system like departmental rates or ABC, how does the plant-wide rate likely distort the product costs?
    Answer: It undercosts Product X and overcosts Product Y. A plant-wide rate based on direct labor hours averages the high overhead costs of the Machining department and the low overhead costs of the Assembly department. Product X uses the expensive Machining department but incurs relatively few direct labor hours. The plant-wide rate will fail to assign the high machining costs to it, thus undercosting it. Conversely, Product Y uses the inexpensive Assembly department but incurs many direct labor hours, causing the plant-wide rate to assign it a large, and incorrect, share of the total overhead (including the expensive machining costs it barely used). This overcosts Product Y.
12. Which of the following is the most probable cause for the significant increase in the S-Pro's reported cost under the ABC system?
    Answer: The S-Pro requires a disproportionately high level of batch-level and product-sustaining activities relative to its machine hour consumption. The core principle of ABC is to trace costs to products based on their consumption of activities. If a product's cost increases significantly under ABC, it means the previous system was undercosting it. This happens when the product consumes a large amount of resources from activities not well correlated with the traditional volume-based driver (machine hours). Batch-level activities (like setups, purchasing) and product-sustaining activities (like engineering changes, special testing) are prime examples. The S-Pro, being a specialized product, likely consumes many of these resources, which ABC now correctly assigns to it.
13. Compared to the amount of quality inspection cost allocated to the Custom model under the traditional system, how much more cost from this specific activity would be allocated under an ABC system?
    Answer: $60,000 This multi-step question requires comparing the implicit allocation of a single activity's cost under traditional costing with its direct allocation under ABC. 1. Traditional System Allocation: * Proportion of machine hours for Custom model = 10,000 MH / 50,000 MH = 20%. Total overhead allocated to Custom model = 20% $400,000 = $80,000. * The quality inspection cost is $100,000 out of $400,000 total OH, which is 25%. Implicit inspection cost allocated to Custom = 25% of the allocated overhead = 25% $80,000 = $20,000. 2. ABC System Allocation: * Total inspections = 50 (Standard) + 200 (Custom) = 250 inspections. * ABC rate for inspections = $100,000 / 250 inspections = $400 per inspection. Inspection cost allocated to Custom = 200 inspections $400/inspection = $80,000. 3. Difference: * The additional cost allocated under ABC is $80,000 (ABC) - $20,000 (Traditional) = $60,000.
14. Product Q requires 1.0 DLH per unit to produce and is responsible for 75% of all quality inspections. Under the traditional costing system, what amount of the per-unit overhead cost assigned to Product Q is implicitly assumed to be for Quality Control?
    Answer: $6.67 This question requires calculating the portion of the traditional overhead rate that relates to a specific activity. 1. Calculate the Traditional Overhead Rate: * Rate = Total Overhead / Total DLH = $600,000 / 30,000 DLH = $20 per DLH. 2. Calculate the Total Traditional Overhead per unit of Product Q: Overhead per unit = Rate DLH per unit = $20/DLH * 1.0 DLH/unit = $20.00. 3. Determine the Proportion of Overhead from Quality Control: * The Quality Control pool is $200,000 of the $600,000 total overhead. * Proportion = $200,000 / $600,000 = 1/3 or 33.33%. 4. Calculate the Implicit Quality Control Cost in Product Q's traditional cost: Implicit cost = Total traditional overhead per unit Proportion from QC. Implicit cost = $20.00 (1/3) = $6.67.
15. A company's ABC implementation reveals that its highest-volume product, which accounts for 60% of units sold, consumes only 25% of total overhead costs. Under the previous traditional costing system using units produced as the allocation base, this product was allocated what percentage of overhead costs?
    Answer: 60% of overhead costs, demonstrating traditional costing significantly overstated this product's overhead Activity-Based Costing (ABC) questions often test your understanding of how traditional costing systems can distort product costs compared to more accurate activity-based allocation methods. The key insight is recognizing what the traditional system would have done versus what ABC reveals as the true cost consumption. Under the traditional costing system using units produced as the allocation base, overhead costs are allocated proportionally to production volume. Since this high-volume product accounts for 60% of units sold, it would receive 60% of the total overhead costs under traditional costing. However, ABC implementation shows this product actually consumes only 25% of overhead costs, revealing that traditional costing significantly overstated the overhead allocation by 35 percentage points (60% - 25% = 35%). Looking at the wrong answers: (A) incorrectly suggests 25%, but traditional costing allocates based on volume, not actual resource consumption. (B) claims 40%, but there's no basis for this figure when traditional costing strictly follows volume proportions. (C) suggests 75%, which would be extremely excessive even for a flawed traditional system and has no logical connection to the 60% volume figure. The correct answer is (D) because traditional costing would allocate overhead costs in direct proportion to production volume—60% of units means 60% of overhead costs. Study tip: When comparing ABC to traditional costing, always remember that traditional systems allocate costs based on the chosen base (often volume), while ABC reveals actual resource consumption. High-volume products are typically overcosted under traditional systems.
16. If the company uses its current traditional costing system, which allocates overhead based on direct labor hours, to evaluate the potential profitability of these models, what is the most likely outcome?
    Answer: The system will report similar overhead costs for both models, leading to an overestimation of Model S's true profitability. A traditional system using direct labor hours will allocate the same amount of overhead per unit to both Model R and Model S because their direct labor hours per unit are identical. This fails to recognize that Model S, with its complexity and frequent setups, is the driver of significant batch-level overhead costs. The system will therefore under-allocate these costs to Model S, making it appear more profitable than it actually is. It will simultaneously over-allocate these costs to the simple Model R, making it appear less profitable. An ABC system would correctly trace the high setup costs to Model S.
17. Which strategic decision would be a direct, logical consequence of these findings?
    Answer: Re-evaluate the pricing structure of the mountain bikes to ensure they are profitable, possibly increasing the price. The ABC results show that the mountain bikes were previously undercosted and may have been less profitable than management believed. The logical next step is to use this more accurate cost information to re-evaluate the product's pricing. It's possible the original price was set too low and needs to be increased to achieve the desired profit margin. Lowering the price (A) would exacerbate the potential profitability problem. Increasing the price of the now-known-to-be-cheaper tricycles (B) might be an option, but the more pressing issue is the potential unprofitability of the mountain bikes. Promoting all products equally (D) ignores the new, powerful information about their relative profitability.
18. If Delta implements ABC, which product's unit cost will most likely decrease compared to traditional costing?
    Answer: Product A, because its high material costs will be spread across multiple activity pools under ABC Under traditional costing, Product A bears high overhead because it has high direct material costs (the allocation base). Under ABC, Product A will likely have lower costs because it consumes fewer non-material-related activities (setups, engineering) that ABC tracks separately. Product A was cross-subsidizing Products B and C under traditional costing. B is incorrect because ABC will likely increase Product B's costs by accurately capturing its high setup and engineering consumption. C is wrong because Product C already has low material costs under traditional costing. D ignores that ABC redistributes costs differently among products.
19. If the company uses a traditional costing system that allocates all overhead based on machine hours, what is the most likely distortion that will occur?
    Answer: The standard product's reported cost will be inflated, absorbing engineering costs it does not incur. The traditional system allocates all overhead, including engineering support, based on machine hours. Since the standard product consumes machine hours but no engineering support, it will be allocated a portion of the engineering support costs. This inflates its cost and makes it appear less profitable. Conversely, the custom product, which is the sole consumer of engineering support, will not be assigned the full cost of that support, leading to an understatement of its true cost. This is a classic case of product cost cross-subsidization.
20. What strategic implication should management consider based on these costing differences?
    Answer: Pricing strategies should be revised to reflect ABC costs, potentially increasing Alpha's price and decreasing Beta's price ABC provides more accurate cost information for pricing decisions. If Product Alpha is more expensive than traditional costing suggested, its price may need to increase to maintain desired margins. If Product Beta is less expensive, there may be room for price reductions to gain market share or improve margins. This is a pricing strategy adjustment based on better cost information. A is too extreme without considering market factors. C ignores the strategic value of accurate costing. D focuses only on production volume without considering market demand, pricing flexibility, and strategic positioning.

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