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 focuses on the various costs associated with goods for sale and the significance of effective inventory management. By understanding ordering and carrying costs, and employing decision models like EOQ, companies can optimize their inventory levels. The use of safety stocks mitigates risks in the face of demand variability, while just-in-time approaches and simplified costing methods such as backflush costing and lean accounting streamline operations and improve accuracy in performance evaluations.

Learning Objectives

1

Explain the different cost categories associated with goods for sale and their impact on inventory management.

2

Describe how decision models like EOQ help balance ordering and carrying costs in inventory planning.

3

Analyze the role of safety stocks in mitigating demand variability in inventory control.

4

Evaluate just-in-time approaches and simplified costing methods such as backflush costing and lean accounting for improving operational efficiency.

Key Concepts

CONCEPT

DEFINITION

Inventory Management

The process of ordering, storing, and using a company's inventory: raw materials, components, and finished products.

Economic Order Quantity (EOQ)

A decision model used to determine the optimal order quantity that minimizes the total costs of ordering and carrying inventory.

Ordering Costs

Costs incurred every time an order is placed, regardless of the order size, such as administrative expenses and shipping fees.

Carrying Costs

Costs associated with holding inventory over a period of time, including storage, insurance, and opportunity costs.

Safety Stock

Additional inventory maintained to buffer against uncertainties in demand or supply variability.

Just-in-Time (JIT)

An inventory strategy aimed at reducing inventory holding costs by receiving goods only as they are needed in the production process.

Backflush Costing

A simplified costing method that delays cost allocation until goods are sold, reducing the need for detailed tracking of inventory costs.

Lean Accounting

An approach to accounting that aligns with lean manufacturing principles, focusing on value creation and waste elimination in accounting processes.

Example Problems

Example 1

Why do better decisions regarding the purchasing and managing of goods for sale frequently cause dramatic percentage increases in net income?

Example 2

Name six cost categories that are important in managing goods for sale in a retail company.

Example 3

What assumptions are made when using the simplest version of the economic-order-quantity (E00) decision model?

Example 4

Give examples of costs included in annual carrying costs of inventory when using the E00 decision model.

Example 5

Give three examples of opportunity costs that typically are not recorded in accounting systems, although they are relevant when using the $\mathrm{E} 00$ model in the presence of demand uncertainty.
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Step-by-Step Explanations

QUESTION

How do you calculate the Economic Order Quantity to minimize inventory costs?

STEP-BY-STEP ANSWER:

Step 1: Identify the total annual demand for the product (D).
Step 2: Determine the fixed cost per order (S) that is incurred each time an order is placed.
Step 3: Calculate the carrying cost per unit per year (H), which includes storage, insurance, and opportunity costs.
Step 4: Apply the EOQ formula: EOQ = √((2DS)/H).
Step 5: Compute the EOQ value, which represents the optimal order quantity that minimizes the total inventory costs.
Final Answer: The EOQ is the square root of the quotient obtained from multiplying two times the annual demand and the ordering cost, divided by the carrying cost per unit.

Economic Order Quantity (EOQ)

QUESTION

How does incorporating safety stock help in inventory management?

STEP-BY-STEP ANSWER:

Step 1: Assess the variability in demand and supply lead times to estimate potential fluctuations.
Step 2: Determine the appropriate safety stock level that can mitigate the risk of stock outs during unexpected demand spikes or delays.
Step 3: Integrate safety stock levels into the overall inventory management process as a buffer layer.
Final Answer: Safety stock acts as an insurance policy against uncertainties in demand or supply, ensuring continuous product availability.

Safety Stock Management

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Common Mistakes

  • Confusing ordering costs with carrying costs and failing to address both in the EOQ model.
  • Underestimating the importance of safety stocks leading to potential stock outs during demand spikes or supply delays.
  • Misapplying just-in-time (JIT) principles without accounting for the necessary flexibility in the supply chain.
  • Overlooking the benefits and implementation differences between traditional costing and simplified methods like backflush costing and lean accounting.