Inventory Valuation Methods (Grade 12 NSC Matric Accounting): Revision Notes

Inventory Valuation Methods

What is inventory valuation?

Inventory valuation is the process of determining the monetary value of a business's stock on hand. This is crucial for calculating cost of sales and gross profit accurately. Businesses must choose a consistent valuation method unless there is a very good reason to change, as the method chosen will affect how inventory is valued on the balance sheet and impact the business's profitability figures.

The three main inventory valuation methods

Businesses can choose from three primary stock valuation methods to value their inventory. Each method has its own characteristics and is suitable for different types of businesses.

1. Specific identification method

The specific identification method is the most straightforward approach to inventory valuation. Under this system, every individual item in stock is assigned its own specific cost price.

How it works:

• Each item is tracked individually with its actual purchase price
• When an item is sold, its exact cost price is recorded
• This requires detailed record-keeping for every single item

When to use this method: This method works best for businesses that sell large, expensive, or unique items where each unit has its own distinct cost. Examples include:

• Vehicle dealerships
• Machinery suppliers
• Jewellery stores
• Art galleries

Advantages:

• Provides the most accurate cost matching
• Easy to understand and implement
• Every item's actual cost is recorded

Disadvantages:

• Very labour-intensive and time-consuming
• Requires detailed manual tracking
• Can be manipulated - businesses might choose which specific items to sell first to show higher or lower profits

2. FIFO method (First in, first out)

FIFO stands for "First In, First Out" and assumes that the oldest stock is sold first, leaving the most recently purchased items in closing stock.

How it works:

• Stock purchased first is considered to be sold first
• The oldest stock prices are used to calculate cost of sales
• Closing stock is valued using the most recent purchase prices
• Like a queue - first person in line is served first

When to use this method: This method is particularly suitable for businesses selling perishable goods or items with limited shelf life, such as:

• Food and grocery stores
• Pharmacies (medicines have expiry dates)
• Electronics (technology becomes outdated)

Key characteristics:

• Closing stock reflects current market prices
• Cost of sales uses older, potentially lower prices
• In times of rising prices, this method typically shows higher gross profit

3. Weighted average method

The weighted average method calculates an average cost for all inventory items and uses this average to value both cost of sales and closing stock.

How it works:

• Calculate the total cost of all stock purchased during the period
• Divide this by the total number of units purchased
• Use this average cost per unit to value closing stock and cost of sales

Formula:

$\text{Weighted average cost per unit} = \frac{\text{Total cost of stock purchased}}{\text{Total number of units purchased}}$

Key characteristics:

• Smooths out price fluctuations over time
• Stock on hand is not valued at the most recent prices
• Uses historical average rather than current market prices
• Provides a balanced approach between FIFO and other methods

Worked example: Applying different methods

Exam tips for inventory valuation questions

When approaching inventory valuation questions in examinations, following a systematic approach is essential for accuracy and time management.

Step 1: Set up your trading account template

Always draw a trading account with two columns - one for amounts and one for units:

DR	Trading Account	CR
Amount	Units	Amount
Opening stock		Closing stock
Purchases		Sales
Total available		Cost of sales

Step 2: Identify the required information

• Opening stock (units and value)
• Purchases during the period (units and cost per unit)
• Sales during the period (units)
• Calculate closing stock (units)

Step 3: Apply the chosen method

• FIFO: Use oldest costs for cost of sales, newest costs for closing stock
• Weighted average: Calculate average cost per unit, apply to both cost of sales and closing stock
• Specific identification: Use actual costs of specific items sold

Step 4: Calculate gross profit

Once you have cost of sales:

$\text{Gross profit} = \text{Sales} - \text{Cost of sales}$