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Secondary 4 Principles of Accounts Inventory Costing Quiz

Free Sec 4 POA Inventory Costing quiz, HY3 Exam version, with questions, answers, and O Level-style practice for Singapore students.

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Questions

Secondary 4 Principles of Accounts Quiz - Inventory Costing

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: _______ / 40

Duration: 60 minutes
Total Marks: 40

Instructions:

Answer all 20 questions.
Show all workings clearly for calculation questions.
Use the space provided to write your answers.
Marks for each question are shown in brackets [ ].

Section A: Basic Concepts and Errors (Questions 1–5)

1. State the accounting principle used to value inventory and give the full basis of valuation. [2]

2. A shop owner valued closing inventory at cost price of $3,200 but its net realisable value is$ 2,900. State the correct value to be recorded for inventory. [1]

3. Explain why inventory is valued at the lower of cost and net realisable value. [2]

4. Joo Leong Traders discovered that its closing inventory on 31 Dec 2024 was overstated by $500. State the effect of this error on the profit for the year ended 31 Dec 2024. [1]

5. Define "net realisable value" in your own words. [2]

Section B: Cost of Sales and Inventory Turnover (Questions 6–10)

6. Calculate the cost of sales for Mei Mei Stationery for the year ended 31 Dec 2024 using the following:

Opening inventory: $4,000
Purchases: $18,500
Closing inventory: $3,200 [2]

Working:

Answer: _______________

7. For the year ended 31 Mar 2024, Hup Chuan Electronics had:

Opening inventory: $6,000
Purchases (net): $24,000
Carriage inwards: $800
Closing inventory: $5,400
Calculate cost of sales. [2]

Working:

Answer: _______________

8. Calculate the inventory turnover rate for Bina Bakery for the year ended 30 Jun 2024:

Cost of sales: $36,000
Opening inventory: $4,000
Closing inventory: $6,000 [2]

Working:

Answer: _______________ times

9. The following information relates to Dina Dress Shop for 2024:

Sales: $50,000
Gross profit: $20,000
Opening inventory: $3,500
Closing inventory: $4,500
First calculate cost of sales, then inventory turnover rate. [3]

Working:

Answer (COGS): _______________
Answer (Turnover): _______________ times

10. State two reasons why a business would want a high inventory turnover rate. [2]

Section C: FIFO and AVCO Methods (Questions 11–15)

11. The following purchases of goods were made by Taufik Trading:

1 Jan: 100 units @ $5
15 Jan: 200 units @ $6
20 Feb: 150 units @ $7
On 28 Feb, 300 units were sold. Using FIFO, calculate the cost of the 300 units sold. [2]

Working:

Answer: _______________

12. Using the same data as Question 11, calculate the value of closing inventory under FIFO. [2]

Working:

Answer: _______________

13. Using AVCO (weighted average cost) for Taufik Trading (same purchases, 300 units sold), calculate the cost per unit and the cost of goods sold. [3]

Working:

Answer (cost/unit): _______________
Answer (COGS): _______________

14. Explain one difference between FIFO and AVCO in terms of how closing inventory is valued. [2]

15. Under rising prices, state which method (FIFO or AVCO) gives a higher closing inventory value and why. [2]

Section D: Analysis and Interpretation (Questions 16–20)

16. Compare and comment on the inventory turnover rates of two companies:

Ali Mini Mart: COGS $48,000; Avg inventory$ 8,000 → 6.0 times
Bee Convenience: COGS $30,000; Avg inventory$ 10,000 → 3.0 times [3]

17. The trial balance of Siti Crafts shows closing inventory $2,500. Explain how closing inventory is treated in the financial statements. [2]

18. A student calculated inventory turnover as Opening Inventory ÷ COGS. Identify the error and give the correct formula. [2]

19. Lim Hardware had closing inventory overstated by $1,200 in 2023. State the effect on 2024 profit if the error is not corrected in 2023. [2]

20. "Inventory should always be recorded at selling price." State whether this is true or false and explain your answer using the prudence concept. [3]

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Answers

Secondary 4 Principles of Accounts Quiz - Inventory Costing (Answer Key)

Total Marks: 40
Topic: Inventory Costing

Section A: Basic Concepts and Errors

1. [2 marks]

Principle: Prudence (conservatism) concept. [1]
Basis: Lower of cost and net realisable value (NRV). [1]
Teaching note: Inventory must not be overstated. Cost is what was paid to acquire goods; NRV is what can be obtained from sale minus costs to sell. We take the lower to be cautious.

2. [1 mark]

$2,900. *Teaching note:* Since NRV ($ 2,900) < cost ( $3,200), inventory is recorded at the lower figure,$ 2,900.

3. [2 marks]

To avoid overstating assets and profit. [1]
The prudence concept requires not anticipating gains but providing for losses; if NRV is lower, value has fallen so we reduce recorded value. [1]
Common mistake: Saying "to follow the law" without referencing prudence.

4. [1 mark]

Profit is overstated by $500.
Teaching note: Closing inventory is subtracted in COGS. Overstated closing inventory → lower COGS → higher profit.

5. [2 marks]

Estimated selling price of inventory minus any costs expected to make the sale (e.g. packaging, transport). [2]
Teaching note: NRV is not the same as selling price; costs to sell must be deducted.

Section B: Cost of Sales and Inventory Turnover

6. [2 marks]
Working:
COGS = Opening + Purchases − Closing
= $4,000 +$ 18,500 − $3,200 =$ 19,300 [2]
Answer: $19,300

7. [2 marks]
Working:
COGS = $6,000 +$ 24,000 + $800 −$ 5,400 = $25,400 [2] Answer:$ 25,400
Marking: 1 mark for including carriage inwards, 1 for correct total.

8. [2 marks]
Working:
Avg inventory = ( $4,000 +$ 6,000) ÷ 2 = $5,000 Turnover =$ 36,000 ÷ $5,000 = 7.2 times [2]
Answer: 7.2 times

9. [3 marks]
COGS = Sales − GP = $50,000 −$ 20,000 = $30,000 [1] Avg inv = ($ 3,500 + $4,500) ÷ 2 =$ 4,000 [1]
Turnover = $30,000 ÷$ 4,000 = 7.5 times [1]
Answers: COGS $30,000; Turnover 7.5 times

10. [2 marks]
Any two:

Lower holding/storage costs [1]
Less risk of obsolescence [1]
Better cash flow as stock converts to cash faster.
Common mistake: Confusing with profitability only.

Section C: FIFO and AVCO Methods

11. [2 marks]
FIFO: sell oldest first.
100 @ $5 =$ 500
200 @ $6 =$ 1,200
Remainder 0 (300 total sold: 100+200) → all from first two batches
COGS = $500 +$ 1,200 = $1,700 [2] Answer:$ 1,700

12. [2 marks]
Remaining: 150 @ $7 =$ 1,050 (from 15 Jan 200 sold, 20 Feb 150 unsold)
Closing inv = $1,050 [2] Answer:$ 1,050

13. [3 marks]
Total units = 100+200+150 = 450
Total cost = $500+$ 1,200+ $1,050 =$ 2,750
Avg cost/unit = $2,750 ÷ 450 =$ 6.111… ≈ $6.11 [1] COGS (300) = 300 ×$ 6.11 = $1,833 [1] Closing inv = 150 ×$ 6.11 = $917 [1] Answers:$ 6.11 per unit; COGS $1,833

14. [2 marks]
FIFO values closing stock at recent purchase prices; AVCO values at average of all purchases. [2]

15. [2 marks]
FIFO gives higher closing inventory. [1]
Because older (cheaper) costs are used in COGS, leaving newer (higher) costs in inventory. [1]

Section D: Analysis and Interpretation

16. [3 marks]
Ali (6.0) turns over stock twice as fast as Bee (3.0). [1]
Ali is more efficient in working capital use, lower storage cost. [1]
Bee may hold too much stock or have slower sales; context matters (size, type). [1]

17. [2 marks]
Shown as current asset in Statement of Financial Position. [1]
Deducted from purchases in income statement via COGS adjustment. [1]

18. [2 marks]
Error: used opening inventory not average; divided wrongly. [1]
Correct: COGS ÷ Average Inventory (opening+closing)/2. [1]

19. [2 marks]
2023 closing overstated → 2023 profit overstated, 2024 opening overstated. [1]
2024 profit understated (high opening inv → high COGS). [1]

20. [3 marks]
False. [1]
Prudence: do not record unrealised profit; inventory at lower of cost/NRV not selling price. [2]