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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 3,200butitsnetrealisablevalueis2,900. 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;Avginventory8,000 → 6.0 times
- Bee Convenience: COGS 30,000;Avginventory10,000 → 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]
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.∗Teachingnote:∗SinceNRV(2,900) < cost (3,200),inventoryisrecordedatthelowerfigure,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 = 5,000Turnover=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]Avginv=(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]Closinginv=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]
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