Book cover for Cost Accounting A Managerial Emphasis

Cost Accounting A Managerial Emphasis

Charles T. Horngren, Srikant M. Datar, Madhav V. Rajan

ISBN #9780132109178

14th Edition

910 Questions

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44,957 Students Helped

Homework Questions

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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

This chapter section highlights the critical differences between variable, absorption, and throughput costing methods, emphasizing the distinct treatment of fixed manufacturing costs. It shows that variable costing expenses fixed costs immediately, affecting operating income differently compared to absorption costing, where costs are deferred via inventory. Additionally, the selection of a denominator-level capacity has a profound impact on cost per unit, production-volume variances, and overall performance evaluation. Managers need to be cautious of these effects to avoid misrepresentation of profitability and avoid potential manipulation through inventory buildup.

Learning Objectives

1

Compare and contrast variable, absorption, and throughput costing methods and explain their impact on operating income.

2

Identify the treatment of fixed manufacturing costs under each costing method and understand how these treatments affect financial performance.

3

Explain the role of denominator-level capacity (theoretical, practical, normal, or master-budget) in determining fixed cost per unit and production-volume variances.

4

Analyze how the choice of costing method and capacity base can influence pricing decisions, performance evaluations, and managerial decision-making.

Key Concepts

CONCEPT

DEFINITION

Variable Costing

A costing method where fixed manufacturing costs are expensed immediately in the period incurred, while only variable production costs are included in inventory valuation.

Absorption Costing

A costing approach that defers fixed manufacturing costs by allocating them to units produced, thus incorporating these costs in inventory valuation until the goods are sold.

Throughput Costing

A method that treats only direct material costs as inventoriable, with all other costs, including fixed manufacturing costs, expensed in the period incurred.

Denominator-Level Capacity

The capacity base (theoretical, practical, normal, or master-budget) used for allocating fixed manufacturing costs per unit; it directly influences cost calculations and variances.

Production-Volume Variance

A variance that arises from the difference between the expected production volume (based on the denominator-level capacity) used in the allocation of fixed overhead and the actual production achieved.

Example Problems

Example 1

Differences in operating income between variable costing and absorption costing are due solely to accounting for fixed costs. Do you agree? Explain.

Example 2

Why is the term direct costing a misnomer?

Example 3

Do companies in either the service sector or the merchandising sector make choices about absorption costing versus variable costing?

Example 4

Explain the main conceptual issue under variable costing and absorption costing regarding the timing for the release of fixed manufacturing overhead as expense.

Example 5

'Companies that make no variable-cost/fixed-cost distinctions must use absorption costing, and those that do make variable-cost/fixed-cost distinctions must use variable costing." Do you agree? Explain.
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Step-by-Step Explanations

QUESTION

How does variable costing affect the calculation of operating income compared to absorption costing?

STEP-BY-STEP ANSWER:

Step 1: Identify all variable production costs that are directly tied to the production of units.
Step 2: Recognize that under variable costing, fixed manufacturing costs are expensed in the period they are incurred, rather than being allocated to each unit produced.
Step 3: Compare the expense recognized under variable costing with that under absorption costing, where fixed manufacturing costs are deferred in inventory.
Step 4: Analyze how this immediate expensing results in differences in the operating income, especially when production levels and sales figures differ, leading to potential fluctuations in reported profitability.
Final Answer: Variable costing typically produces lower operating income during periods of rising inventory levels because fixed costs are expensed immediately, unlike absorption costing which defers some of these costs into inventory.

Variable Costing and Operating Income

QUESTION

How does the choice of denominator-level capacity influence fixed cost per unit and production-volume variances?

STEP-BY-STEP ANSWER:

Step 1: Understand that denominator-level capacity represents the production level used to allocate fixed costs, based on theoretical, practical, normal, or master-budget figures.
Step 2: Calculate the fixed cost per unit by dividing the total fixed manufacturing cost by the chosen capacity level.
Step 3: Note that a higher capacity base (e.g., theoretical capacity) results in a lower fixed cost per unit, while a lower capacity (e.g., master-budget) increases the per unit cost.
Step 4: Recognize that production-volume variances arise when there is a difference between expected production (denominator-level capacity) and actual production, affecting performance evaluation.
Final Answer: The choice of denominator-level capacity directly affects the fixed manufacturing cost per unit and can lead to significant production-volume variances, influencing managerial decisions and reported profitability.

Denominator-Level Capacity in Cost Allocation

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Common Mistakes

  • Assuming that all costing methods produce the same operating income regardless of production volume differences.
  • Overlooking the impact of the chosen denominator-level capacity on fixed cost per unit calculations.
  • Confusing the treatment of fixed manufacturing costs under variable costing with absorption and throughput costing.
  • Ignoring the implications of production-volume variances when evaluating managerial performance and pricing strategies.