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O Level Principles of Accounts Inventory Costing Quiz

Free O Level POA Inventory Costing quiz, Gemma31B Exam version, with questions, answers, and O Level-style practice for Singapore students.

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O Level Principles of Accounts From Real Exams Generated by Gemma 4 31B Updated 2026-08-17

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Questions

O-Level Principles of Accounts Quiz - Inventory Costing

Name: ____________________ Class: ____________________ Date: ____________________ Score: ________ / 45

Duration: 60 Minutes
Total Marks: 45
Instructions: Answer all questions. Show all workings clearly. Round all calculations to two decimal places where applicable.

Section A: Basic Calculations (Questions 1-8)

Define the term 'Closing Inventory'. [1]
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Calculate the cost of sales for Zenith Trading for the month of March 2024. [2]
- Opening Inventory: $12,000
- Purchases: $45,000
- Closing Inventory: $14,500
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A business has a Cost of Sales of $120,000 and an Average Inventory of$ 15,000. Calculate the Inventory Turnover Ratio. [1]
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Using the answer from Question 3, calculate the Days Sales in Inventory. [2]
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State the accounting principle that requires inventory to be valued at the lower of cost and net realizable value (NRV). [1]
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Explain why a business would value inventory at NRV instead of cost. [2]
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Calculate the ending inventory as at 31 December 2023. [2]
- Opening Inventory: $8,000
- Purchases: $22,000
- Cost of Sales: $18,000
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If a business uses the FIFO method, which units are assumed to be sold first? [1]
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Section B: Application & Analysis (Questions 9-15)

Compare the effects of FIFO and AVCO on the value of closing inventory during a period of rising prices. [3]
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Calculate the Days Sales in Inventory for the two years ended 30 June 2023 and 30 June 2024. [4]

Item 2023 2024
Cost of Sales $200,000 $240,000
Opening Inventory $30,000 $35,000
Closing Inventory $35,000 $45,000
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Explain how an overstatement of closing inventory affects the gross profit for the period. [2]
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A business has the following inventory movements for May:
- May 1: Opening Balance 100 units @ $5 each
- May 10: Purchased 200 units @ $6 each
- May 20: Sold 150 units Calculate the value of closing inventory using the FIFO method. [3]
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Using the same data as Question 12, calculate the value of closing inventory using the AVCO (Weighted Average) method. [3]
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State two non-accounting factors a business should consider when deciding on its inventory levels. [2]
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Describe the impact on the Statement of Financial Position if inventory is written down to its NRV. [2]
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Item	2023	2024
Cost of Sales	$200,000	$240,000
Opening Inventory	$30,000	$35,000
Closing Inventory	$35,000	$45,000
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Section C: Structured & Integrated Tasks (Questions 16-20)

Prepare the Inventory Account (T-account) for Alpha Ltd for the month of January 2024. [4]
- Jan 1: Balance b/d $5,000
- Jan 15: Purchases $12,000
- Jan 31: Closing Inventory $6,500
  
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A business has a Days Sales in Inventory of 85 days. The industry average is 45 days. Evaluate this result. [3]
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Recommend two actions a business can take to reduce its Days Sales in Inventory. [4]
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Explain the relationship between the Inventory Turnover Ratio and the liquidity of a business. [3]
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A business discovered that closing inventory was understated by $2,000. State the effect of this error on: (a) Gross Profit and (b) Current Assets. [2] (a) _______________________________________________________________________ (b) _______________________________________________________________________

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Answers

O-Level Principles of Accounts Quiz - Inventory Costing (Answers)

Definition: The value of goods remaining unsold at the end of an accounting period. (1m)
Calculation: $12,000 +$ 45,000 - $14,500 = **$ 42,500** (2m)
Ratio: $120,000 /$ 15,000 = 8 times (1m)
Days Sales: 365 / 8 = 45.63 days (2m)
Principle: Prudence Concept. (1m)
Explanation: To ensure assets and profits are not overstated (1m); if the selling price minus costs to sell is lower than what we paid, we must recognize the loss immediately (1m). (2m)
Calculation: $8,000 +$ 22,000 - $18,000 = **$ 12,000** (2m)
FIFO: The oldest units (first in) are assumed to be sold first. (1m)
Comparison:
- FIFO: Closing inventory consists of the most recent, higher-priced purchases, leading to a higher closing inventory value (1m).
- AVCO: Closing inventory is valued at a weighted average, resulting in a value between FIFO and LIFO (1m).
- Effect: FIFO results in higher reported profit during rising prices (1m). (3m)
Days Sales Calculation:
- 2023: Avg Inv = (30k+35k)/2 = 32.5k. Ratio = 200k/32.5k = 6.15. Days = 365/6.15 = 59.35 days (2m)
- 2024: Avg Inv = (35k+45k)/2 = 40k. Ratio = 240k/40k = 6.00. Days = 365/6 = 60.83 days (2m)
Effect: Overstated closing inventory reduces the Cost of Sales (1m), which leads to an overstatement of Gross Profit (1m). (2m)
FIFO Calculation:
- Total units = 100 + 200 = 300. Sold = 150. Remaining = 150.
- All 150 remaining units are from the May 10 batch (@ $6).
- 150 * $6 = **$ 900** (3m)
AVCO Calculation:
- Total Cost = (100 * 5) + (200 * 6) = 500 + 1200 = $1,700.
- Total Units = 300.
- Average Cost = $1,700 / 300 =$ 5.67 per unit.
- Closing Inventory = 150 * $5.67 = **$ 850.50** (3m)
Non-accounting factors: (Any two) Storage capacity, perishability of goods, lead time from suppliers, market trends/obsolescence. (2m)
SFP Impact: The value of Current Assets (Inventory) will decrease (1m), and the equity/profit will decrease due to the write-down expense (1m). (2m)
Inventory Account:
- Debit: Balance b/d $5,000; Purchases$ 12,000.
- Credit: Cost of Sales (balancing figure) $10,500; Balance c/d$ 6,500.
- Balance b/d (next month) $6,500 on Debit side. (4m)
Evaluation: The business is holding inventory for significantly longer than the industry average (1m). This suggests inefficient inventory management or slow-moving stock (1m), which ties up working capital (1m). (3m)
Recommendations:
- Implement Just-in-Time (JIT) inventory system to reduce stock levels (2m).
- Offer discounts or promotions to clear slow-moving stock (2m). (4m)
Relationship: A higher inventory turnover ratio means inventory is sold faster (1m). This improves liquidity as cash is recovered more quickly from stock (1m), reducing the need for external short-term financing (1m). (3m)
Error Effect: (a) Gross Profit: Understated (1m) (b) Current Assets: Understated (1m) (2m)