Exam Questions on Stock Validation (Grade 12 NSC Matric Accounting): Revision Notes

Exam Questions on Stock Validation

Understanding how to tackle stock validation questions is crucial for NSC Accounting success. These questions often challenge students because they require combining multiple calculation methods and applying them systematically to real business scenarios.

Systematic approach to stock validation questions

The most effective way to tackle these questions is to follow a structured three-step process that ensures you don't miss any crucial information.

Step 1: Set up your Trading Account template

The most important skill is memorising the Trading Account format. Always draw your Trading Account with two columns - one for Rand amounts and one for units. This dual-column approach is essential for stock validation questions.

DR	Trading Account	CR
Amount	Units	Amount
Opening stock		Closing stock
Purchases (net)		Sales (net)
Carriage on purchases
Custom duties

Step 2: Record all given information

Once you have your Trading Account template, extract all the figures from the question and record them in the appropriate places. Don't worry about the format the question uses - simply transfer the information to your standard template.

Step 3: Apply the appropriate stock method

Depending on whether the question asks for FIFO or Weighted Average, use the correct method to calculate closing stock values.

Key formulas you must memorise

These fundamental formulas form the backbone of all stock validation calculations:

Cost of sales calculation

$\text{Opening stock} + \text{Net purchases} + \text{Carriage on purchases} + \text{Custom duties} - \text{Closing stock} = \text{Cost of sales}$

Gross profit calculation

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

Stock turnover ratio

$\text{Stock turnover} = \frac{\text{Cost of sales}}{\text{Average stock}}$

This tells you how many times per year the business replaces its stock.

Period of stock on hand

$\text{Period of stock on hand} = \frac{\text{Average stock}}{\text{Cost of sales}} \times 365 \text{ days}$

This shows how long stock sits on shelves before being sold.

Mark-up percentage

$\text{Mark-up \%} = \frac{\text{Gross profit}}{\text{Cost of sales}} \times 100$

FIFO method (First in, first out)

Under FIFO, closing stock consists of the most recently purchased items. This method assumes that the oldest stock is sold first, leaving the newest stock on hand.

When calculating closing stock value using FIFO:

1. Identify the number of units in closing stock
2. Start with the most recent purchases
3. Work backwards through purchase dates until you have enough units
4. Calculate the total value using the unit prices from these recent purchases
5. Add carriage on purchases per unit if applicable
6. Add custom duties per unit if applicable

Weighted average method

Under the weighted average method, all stock is valued at the same average cost per unit, regardless of when it was purchased.

The calculation process involves:

1. Add up the total value of all stock available (opening stock + all purchases + carriage + customs)
2. Add up the total number of units available
3. Calculate: Total value ÷ Total units = Average cost per unit
4. Multiply: Closing stock units × Average cost per unit = Closing stock value

Stock validation process

Stock validation involves comparing what should be in stock with what is actually there. This process helps identify stock theft or shrinkage.

The validation process follows these steps:

1. Calculate total units that should be available (opening stock + purchases)
2. Subtract units that should have been sold (sales units)
3. Compare this with actual closing stock count
4. Any difference indicates stock theft or shrinkage

Recording stock theft

If stock has been stolen:

• Debit: Trading stock deficit/Loss due to theft
• Credit: Trading stock

Common exam question patterns

Understanding these five common patterns will help you identify the approach needed for any stock validation question:

Pattern 1: Basic stock valuation

Calculate closing stock value using FIFO or weighted average method.

Pattern 2: Cost of sales and gross profit

Use the Trading Account format to find missing figures like cost of sales or gross profit.

Pattern 3: Stock validation with theft

Identify missing stock and make appropriate journal entries.

Pattern 4: Financial ratio calculations

Calculate stock turnover, period of stock on hand, or mark-up percentage.

Pattern 5: Advice on stock management

Provide recommendations based on calculated ratios (usually asking for two points).

Exam tips for success

These proven strategies will help you maximise your marks on stock validation questions:

• Always draw the Trading Account first - this gives you a framework to work within
• Use both Rand and units columns - many questions require unit calculations
• Check your arithmetic carefully - small calculation errors can lose many marks
• Show all working clearly - partial marks are available for correct methods
• Read requirements carefully - some questions ask for specific formats or explanations
• Practice the stock validation formula: Opening stock + Purchases - Sales = Expected closing stock