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O Level Principles of Accounts Inventory Costing Quiz

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Questions

O-Level Principles of Accounts Quiz - Inventory Costing

Name: __________________________
Class: __________________________
Date: __________________________
Score: ______ / 40

Duration: 45 Minutes
Total Marks: 40

Instructions:

Answer all questions.
Show all workings clearly. Marks are awarded for method.
Round monetary values to two decimal places unless otherwise stated.
This quiz focuses on Inventory Valuation (FIFO, AVCO) and Inventory Analysis.

Section A: Multiple Choice & Short Concepts (5 Marks)

1. Which of the following best describes the FIFO (First-In, First-Out) method of inventory valuation?
A. The cost of goods sold is based on the most recent purchase prices.
B. The closing inventory is valued at the oldest purchase prices.
C. The cost of goods sold is based on the oldest purchase prices, and closing inventory reflects recent prices.
D. The average cost of all units available for sale is used for both cost of sales and closing inventory.

[1]

2. In a period of rising prices (inflation), which inventory valuation method will result in the highest reported net profit?
A. FIFO
B. AVCO (Weighted Average Cost)
C. LIFO (Last-In, First-Out) - Note: Not permitted under SFRS, but conceptually tested
D. Specific Identification

[1]

3. State the accounting concept that requires inventory to be valued at the lower of cost and net realizable value (NRV).

[1]

4. Define Net Realizable Value (NRV) in the context of inventory valuation.

[1]

5. Why is consistency in the choice of inventory valuation method important for financial statement users?

[1]

Section B: Calculations – FIFO and AVCO (25 Marks)

Context for Questions 6–10:
TechParts Pte Ltd sells a specific component. The following transactions occurred in March 2024:

Date	Transaction	Units	Cost per Unit ($)	Selling Price per Unit ($)
1 Mar	Opening Inventory	100	10.00	-
5 Mar	Purchase	200	12.00	-
10 Mar	Sale	150	-	25.00
15 Mar	Purchase	100	14.00	-
20 Mar	Sale	180	-	25.00
25 Mar	Purchase	50	15.00	-

6. Using the FIFO method, calculate the value of the Closing Inventory as at 31 March 2024. Show your workings.

[3]

7. Using the FIFO method, calculate the Cost of Sales for the month of March 2024. Show your workings.

[3]

8. Using the AVCO (Weighted Average Cost) method, calculate the weighted average cost per unit after the purchase on 5 March. Round to two decimal places.

[2]

9. Using the AVCO method (recalculating the average after each purchase), calculate the value of the Closing Inventory as at 31 March 2024.
Note: Recalculate the average cost per unit after the purchase on 15 March.

[5]

10. Compare the Gross Profit calculated under FIFO and AVCO for March 2024.
(a) Calculate Gross Profit under FIFO.
(b) Calculate Gross Profit under AVCO.
(c) State which method yields a higher Gross Profit and briefly explain why, referring to the price trend in the data.

[6]

Section C: Inventory Ratios and Analysis (10 Marks)

Context for Questions 11–15:
GreenGrocers has the following financial data for the years ended 31 December 2023 and 2024:

	2023 ($)	2024 ($)
Revenue	500,000	550,000
Cost of Sales	300,000	340,000
Opening Inventory	40,000	45,000
Closing Inventory	45,000	60,000

11. Calculate the Average Inventory for the year 2023.

[1]

12. Calculate the Inventory Turnover Ratio (times) for 2023.
Formula: Cost of Sales / Average Inventory

[1]

13. Calculate the Average Inventory for the year 2024.

[1]

14. Calculate the Inventory Turnover Ratio (times) for 2024.

[1]

15. Based on your answers in Questions 12 and 14:
(a) Interpret the change in the inventory turnover ratio from 2023 to 2024.
(b) Recommend two actions GreenGrocers could take to improve their inventory management efficiency.

[6]

Section D: Advanced Concepts & Application (10 Marks)

16. Explain the impact of an overstatement of closing inventory on the following items in the current year's financial statements:
(a) Gross Profit
(b) Net Profit
(c) Current Assets
(d) Owner's Equity

[4]

17. A business uses the Specific Identification method for inventory valuation.
(a) Describe one type of business or inventory item where this method is most appropriate.
(b) State one disadvantage of using this method for a business selling high-volume, low-value items (e.g., a supermarket).

[2]

18. Differentiate between a periodic inventory system and a perpetual inventory system in terms of when the Cost of Sales is calculated.

[2]

19. Scenario: On 31 December, TechParts Pte Ltd holds 10 units of Component X.

Original Cost per unit: $20.00
Current Replacement Cost per unit: $18.00
Estimated Selling Price per unit: $22.00
Estimated Costs to Sell per unit: $3.00

Calculate the value at which these 10 units should be included in the Statement of Financial Position, showing your calculation of Net Realizable Value (NRV).

[2]

20. Why might a company choose to change its inventory valuation method from FIFO to AVCO? State one valid reason and one requirement that must be met when making such a change in financial reporting.

[2]

End of Quiz

Answers

O-Level Principles of Accounts Quiz - Inventory Costing (Answer Key)

Section A: Multiple Choice & Short Concepts

1. C
Reasoning: FIFO assumes the first items bought are the first sold. Therefore, Cost of Sales uses older (cheaper in inflation) costs, and Closing Inventory uses newer (higher) costs.

2. A
Reasoning: In rising prices, FIFO assigns lower older costs to Cost of Sales, resulting in higher Gross Profit and Net Profit compared to AVCO or LIFO.

3. Prudence Concept
Accept: Concept of Prudence.

4. Estimated selling price less all estimated costs of completion and costs to be incurred in marketing, selling and distribution.
Key marks: Selling price minus costs to sell/complete.

5. To allow for meaningful comparison of financial performance over time (consistency/comparability).
Key marks: Comparability / Trend analysis / Consistency.

Section B: Calculations – FIFO and AVCO

6. FIFO Closing Inventory
Total Units Available: $100 + 200 + 100 + 50 = 450$ units
Total Units Sold: $150 + 180 = 330$ units
Closing Inventory Units: $450 - 330 = 120$ units

Under FIFO, closing inventory consists of the most recent purchases:

50 units from 25 Mar @ $15.00 =$ 750
70 units from 15 Mar @ $14.00 =$ 980
(Remaining 120 - 50 = 70)

Value: $750 +$ 980 = $1,730

[3 marks: 1 for correct units, 1 for correct layering, 1 for final value]

7. FIFO Cost of Sales
Method 1: Total Cost of Goods Available for Sale - Closing Inventory
Opening: $100 \times 10 = 1,000$
Purchases: $(200 \times 12) + (100 \times 14) + (50 \times 15) = 2,400 + 1,400 + 750 = 4,550$
Total Available: $5,550$
Less Closing Inv: $1,730$
Cost of Sales: $5,550 - 1,730 = **$ 3,820**$

Method 2: Direct Calculation of Sold Units
Sale 10 Mar (150 units):

100 @ $10 = 1,000$
50 @ $12 = 600$
Sale 20 Mar (180 units):
150 @ $12 = 1,800$ (Remaining from 5 Mar purchase)
30 @ $14 = 420$ (From 15 Mar purchase)
Total: $1,000 + 600 + 1,800 + 420 = **$ 3,820**$

[3 marks: 1 for method/workings, 1 for accuracy, 1 for final answer]

8. AVCO Average Cost after 5 March Purchase
Opening: 100 units @ $10 =$ 1,000
Purchase 5 Mar: 200 units @ $12 =$ 2,400
Total Value: $3,400 Total Units: 300 Average Cost:$ 3,400 / 300 = $11.33 (rounded to 2 d.p.)

[2 marks: 1 for total value/units, 1 for correct division]

9. AVCO Closing Inventory

Step 1: After 10 Mar Sale
Units sold: 150 @ $11.333... (use unrounded for precision if possible, or follow strict rounding rules. Standard practice: keep precision in calculator). Remaining Units:$ 300 - 150 = 150 $units. Value:$ 150 \times 11.3333... = $1,700$ (Exactly $3400/2$ )

Step 2: After 15 Mar Purchase
Existing: 150 units valued at $1,700 Purchase: 100 units @$ 14 = $1,400 Total Value:$ 3,100
Total Units: 250
New Average Cost: $3,100 / 250 = **$ 12.40**

Step 3: After 20 Mar Sale
Units sold: 180 @ $12.40 =$ 2,232
Remaining Units: $250 - 180 = 70$ units.
Value: $70 \times 12.40 =$ 868$

Step 4: After 25 Mar Purchase
Existing: 70 units valued at $868 Purchase: 50 units @$ 15 = $750 Total Value:$ 1,618
Total Units: 120

Closing Inventory Value: $1,618

[5 marks: 1 for avg cost after 5 Mar sale balance, 1 for new avg after 15 Mar purchase, 1 for balance after 20 Mar sale, 1 for final addition, 1 for final answer]

10. Comparison of Gross Profit

(a) Gross Profit (FIFO)
Revenue: $(150 + 180) \times 25 = 330 \times 25 =$ 8,250 $Cost of Sales (from Q7):$ 3,820 $Gross Profit:$ 8,250 - 3,820 = ** $4,430**$

(b) Gross Profit (AVCO)
Revenue: $8,250$
Cost of Sales (AVCO):
Total Available ( $5,550) - Closing Inv ($ 1,618) = $3,932$
Gross Profit: $8,250 - 3,932 = **$ 4,318**$

(c) Explanation
FIFO yields a higher Gross Profit ( $4,430 vs$ 4,318).
Reason: Prices are rising ( $10 ->$ 12 -> $14 ->$ 15). FIFO assigns the older, lower costs to Cost of Sales, resulting in lower expenses and higher profit. AVCO smooths the cost, resulting in a higher Cost of Sales than FIFO in an inflationary period.

[6 marks: 2 for FIFO GP, 2 for AVCO GP, 2 for explanation linking price trend to profit difference]

Section C: Inventory Ratios and Analysis

11. Average Inventory 2023
$(40,000 + 45,000) / 2 = **$ 42,500**$

[1 mark]

12. Inventory Turnover 2023
$300,000 / 42,500 = **7.06 times**$

[1 mark]

13. Average Inventory 2024
$(45,000 + 60,000) / 2 = **$ 52,500**$

[1 mark]

14. Inventory Turnover 2024
$340,000 / 52,500 = **6.48 times**$

[1 mark]

15. Interpretation and Recommendations

(a) Interpretation
The inventory turnover ratio has decreased from 7.06 times to 6.48 times. This indicates that GreenGrocers is selling its inventory more slowly in 2024 compared to 2023. Inventory is holding for longer periods, which may tie up cash flow and increase the risk of obsolescence or spoilage (especially for groceries).

(b) Recommendations

Review Pricing Strategy: Consider offering discounts or promotions on slow-moving items to clear stock and increase sales volume.
Improve Inventory Control: Use data analytics to better predict demand and avoid over-ordering perishable goods. Implement Just-In-Time (JIT) ordering where feasible to reduce holding levels.
(Other valid answers: Improve marketing, negotiate better terms with suppliers to reduce order frequency but not necessarily volume if storage is an issue, write off obsolete stock).

[6 marks: 2 for interpretation (trend + implication), 2 for each recommendation (1 for action, 1 for relevance/reasoning)]

Section D: Advanced Concepts & Application

16. Impact of Overstated Closing Inventory
(a) Gross Profit: Overstated (Higher)
(b) Net Profit: Overstated (Higher)
(c) Current Assets: Overstated (Higher)
(d) Owner's Equity: Overstated (Higher)
Reasoning: Closing Inventory is added to calculate Gross Profit. If CI is too high, GP is too high, leading to higher Net Profit. Higher Net Profit increases Capital/Equity. CI is a Current Asset.

[4 marks: 1 for each correct impact]

17. Specific Identification
(a) Appropriate Business/Item: High-value, unique items such as cars, jewelry, custom-made furniture, or real estate.
(b) Disadvantage for High-Volume/Low-Value: It is administratively expensive and time-consuming to track the specific cost of each individual unit (e.g., every can of soda or box of cereal).

[2 marks: 1 for appropriate example, 1 for disadvantage]

18. Periodic vs Perpetual Systems

Periodic: Cost of Sales is calculated only at the end of the accounting period (after a physical count determines Closing Inventory).
Perpetual: Cost of Sales is calculated and recorded immediately after each sale transaction.

[2 marks: 1 for each correct distinction regarding timing]

19. Lower of Cost and NRV Calculation

Cost per unit: $20.00
NRV per unit: Selling Price ( $22.00) - Costs to Sell ($ 3.00) = $19.00
Comparison: Lower of $20.00 (Cost) and$ 19.00 (NRV) is $19.00.
Total Value: 10 units × $19.00 = **$ 190.00**

[2 marks: 1 for correct NRV calculation/comparison, 1 for final total value]

20. Change in Accounting Policy

Reason: To provide more reliable or relevant information (e.g., AVCO might better reflect the current cost flow if prices are volatile, or to align with industry standards).
Requirement: The change must be applied retrospectively (restating prior years' figures for comparability) and disclosed in the notes to the financial statements, explaining the nature and financial impact of the change.

[2 marks: 1 for valid reason, 1 for requirement (retrospective application/disclosure)]