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O Level Principles of Accounts Inventory Costing Quiz

Free O Level POA Inventory Costing quiz, Claude AI version, with questions, answers, and O Level-style practice for Singapore students.

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O Level Principles of Accounts AI Generated Generated by Claude Sonnet 4 Updated 2026-08-17

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Questions

O-Level Principles of Accounts Quiz - Inventory Costing

Name: _________________ Class: _________ Date: _________

Score: _____ / 50 Duration: 45 minutes

Instructions:

Answer ALL questions in the spaces provided
Show all workings clearly
Calculators are permitted
Round monetary amounts to 2 decimal places where appropriate

Section A: Multiple Choice (10 marks)

Circle the letter of the correct answer.

1. Which inventory costing method assumes that the oldest items are sold first? a) LIFO
b) FIFO
c) AVCO
d) Specific identification (1 mark)

2. During periods of rising prices, which method will result in the highest closing inventory value? a) LIFO
b) FIFO
c) AVCO
d) All methods give the same result (1 mark)

3. The inventory turnover ratio is calculated as: a) Average inventory ÷ Cost of sales
b) Cost of sales ÷ Average inventory
c) Sales ÷ Closing inventory
d) Opening inventory ÷ Purchases (1 mark)

4. Days sales in inventory measures: a) How many days it takes to sell inventory
b) How many days of sales are held in inventory
c) The number of days between purchases
d) Both a and b are correct (1 mark)

5. Under the AVCO method, the cost per unit is recalculated: a) Only at the end of the period
b) After each purchase
c) After each sale
d) Monthly (1 mark)

6. Which of the following would improve inventory turnover? a) Increasing inventory levels
b) Reducing sales
c) Implementing just-in-time ordering
d) Extending supplier payment terms (1 mark)

7. The lower of cost and net realizable value rule is based on: a) Matching concept
b) Prudence concept
c) Consistency concept
d) Materiality concept (1 mark)

8. Net realizable value is: a) Cost price minus profit margin
b) Selling price minus costs to complete and sell
c) Average cost of inventory
d) Market price of inventory (1 mark)

9. Which inventory method is NOT permitted under Singapore accounting standards? a) FIFO
b) LIFO
c) AVCO
d) Specific identification (1 mark)

10. Obsolete inventory should be valued at: a) Original cost
b) Replacement cost
c) Net realizable value
d) Zero if unsaleable (1 mark)

Section B: Short Answer Questions (20 marks)

11. Complete the following inventory record using the FIFO method: (6 marks)

March 2024 Transactions:

1 March: Opening inventory 50 units at $8 each
10 March: Purchased 100 units at $10 each
15 March: Sold 80 units
25 March: Purchased 60 units at $12 each
30 March: Sold 70 units

Date	Purchases	Sales	Balance
1 Mar			50 units @ $8 =$ 400
10 Mar	_________________		_________________
15 Mar		_________________	_________________
25 Mar	_________________		_________________
30 Mar		_________________	_________________

12. Calculate the gross profit for March 2024 using the FIFO method from Question 11. Sales price was $15 per unit. (4 marks)

Sales revenue: _________________

Cost of sales: _________________

Gross profit: _________________

13. List THREE advantages of using the FIFO method for inventory costing: (3 marks)

a) _________________________________________________

b) _________________________________________________

c) _________________________________________________

14. Explain why inventory turnover is an important ratio for business management: (3 marks)

15. State the accounting concept that requires inventory to be valued at the lower of cost and net realizable value: (1 mark)

16. Calculate the days sales in inventory if:

Cost of sales = $240,000
Average inventory = $40,000 (3 marks)

Inventory turnover ratio: _________________

Days sales in inventory: _________________

Section C: Structured Questions (20 marks)

17. TechMart Trading uses the periodic inventory system. The following transactions occurred in April 2024:

1 April: Opening inventory 200 units at $25 each
8 April: Purchased 300 units at $28 each
15 April: Sold 250 units at $40 each
22 April: Purchased 150 units at $30 each
28 April: Sold 200 units at $42 each

Required: (a) Calculate the value of closing inventory using the AVCO method. Show all workings. (5 marks)

(b) Calculate the gross profit for April 2024 using the AVCO method. (3 marks)

18. Fashion Boutique has the following information for the year ended 31 December 2024:

Sales revenue: $450,000
Opening inventory: $35,000
Purchases: $280,000
Closing inventory: $42,000
Average inventory: $38,500

Required: (a) Calculate the inventory turnover ratio for 2024. (2 marks)

(b) Calculate the days sales in inventory. (2 marks)

(c) The industry average for days sales in inventory is 45 days. Comment on Fashion Boutique's performance and recommend TWO actions to improve inventory management. (4 marks)

Comment: _________________________________________________

Recommendations:

19. Explain the impact of using FIFO versus AVCO methods during a period of rising prices on: (4 marks)

(a) Closing inventory value:

(b) Cost of sales:

(c) Gross profit:

(d) Income tax payable:

END OF QUIZ

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Answers

O-Level Principles of Accounts Quiz - Inventory Costing

Answer Key and Marking Scheme

Section A: Multiple Choice (10 marks)

1 mark each

b) FIFO - First In First Out assumes oldest items are sold first
b) FIFO - During rising prices, FIFO leaves newest (higher cost) items in inventory
b) Cost of sales ÷ Average inventory - Standard formula for inventory turnover
d) Both a and b are correct - Days sales in inventory measures both concepts
b) After each purchase - AVCO recalculates weighted average after each purchase
c) Implementing just-in-time ordering - Reduces inventory levels, improves turnover
b) Prudence concept - Conservative valuation to avoid overstatement
b) Selling price minus costs to complete and sell - Definition of NRV
b) LIFO - Not permitted under Singapore/International standards
d) Zero if unsaleable - Obsolete inventory with no NRV should be written off

Section B: Short Answer Questions (20 marks)

11. FIFO Inventory Record (6 marks) 1 mark for each correct entry

Date	Purchases	Sales	Balance
1 Mar			50 units @ $8 =$ 400
10 Mar	100 units @ $10 =$ 1,000		50 @ $8 + 100 @$ 10 = $1,400
15 Mar		50 @ $8 + 30 @$ 10 = $700	70 units @ $10 =$ 700
25 Mar	60 units @ $12 =$ 720		70 @ $10 + 60 @$ 12 = $1,420
30 Mar		70 @ $10 =$ 700	60 units @ $12 =$ 720

12. Gross Profit Calculation (4 marks)

Sales revenue: 150 units × $15 = **$ 2,250** (1 mark)
Cost of sales: $700 +$ 700 = $1,400 (2 marks)
Gross profit: $2,250 -$ 1,400 = $850 (1 mark)

13. FIFO Advantages (3 marks) 1 mark each for any three valid advantages:

Matches physical flow of goods in most businesses
Closing inventory reflects recent costs/current values
Easier to understand and apply
Provides higher profits during inflation (acceptable answer)
Less manipulation possible compared to other methods

14. Inventory Turnover Importance (3 marks) Award marks for mentioning:

Measures efficiency of inventory management (1 mark)
Indicates how quickly inventory converts to sales/cash (1 mark)
Helps identify slow-moving stock and cash flow issues (1 mark)

15. Accounting Concept (1 mark) Prudence concept (or conservatism concept)

16. Days Sales in Inventory (3 marks)

Inventory turnover ratio: $240,000 ÷$ 40,000 = 6 times (1 mark)
Days sales in inventory: 365 ÷ 6 = 60.83 days (2 marks)

Section C: Structured Questions (20 marks)

17. TechMart Trading

(a) AVCO Closing Inventory (5 marks)

Step 1: Calculate total cost and units after each purchase

After 8 April purchase: 500 units costing $13,400 (200×$ 25 + 300×$28)
Average cost: $13,400 ÷ 500 =$ 26.80 per unit (1 mark)

Step 2: After 15 April sale

Remaining: 250 units at $26.80 =$ 6,700 (1 mark)

Step 3: After 22 April purchase

Total: 400 units costing $11,200 (250×$ 26.80 + 150×$30)
New average: $11,200 ÷ 400 =$ 28 per unit (1 mark)

Step 4: After 28 April sale

Closing inventory: 200 units × $28 = **$ 5,600** (2 marks)

(b) Gross Profit (3 marks)

Sales revenue: (250× $40) + (200×$ 42) = $18,400 (1 mark)
Cost of sales: $13,400 -$ 5,600 = $7,800 (1 mark)
Gross profit: $18,400 -$ 7,800 = $10,600 (1 mark)

18. Fashion Boutique

(a) Inventory Turnover (2 marks)

Cost of sales: $35,000 +$ 280,000 - $42,000 =$ 273,000 (1 mark)
Inventory turnover: $273,000 ÷$ 38,500 = 7.09 times (1 mark)

(b) Days Sales in Inventory (2 marks)

Days sales in inventory: 365 ÷ 7.09 = 51.48 days (2 marks)

(c) Comment and Recommendations (4 marks) Comment: Fashion Boutique's 51.48 days is higher than industry average of 45 days, indicating slower inventory turnover and potential overstocking. (1 mark)

Recommendations: (1.5 marks each)

Implement better demand forecasting to reduce excess inventory
Introduce clearance sales for slow-moving items
Negotiate shorter lead times with suppliers
Implement just-in-time ordering system (Accept any two reasonable recommendations)

19. FIFO vs AVCO Impact (4 marks) 1 mark each

(a) Closing inventory value: FIFO will show higher closing inventory value as it includes recent higher-cost purchases

(b) Cost of sales: FIFO will show lower cost of sales as older, cheaper items are assumed sold first

(c) Gross profit: FIFO will show higher gross profit due to lower cost of sales

(d) Income tax payable: FIFO will result in higher tax payable due to higher reported profits

Total: 50 marks

Marking Notes:

Award partial credit for workings even if final answer is incorrect
Accept reasonable alternative wording for explanations
Deduct marks for poor presentation or missing workings where required
Round final monetary amounts to 2 decimal places