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O Level Principles of Accounts Inventory Costing Quiz

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O-Level Principles of Accounts Quiz - Inventory Costing

Name: __________________________
Class: __________________________
Date: __________________________
Score: ______ / 50

Duration: 45 Minutes
Total Marks: 50

Instructions:

  1. Answer all questions.
  2. Show all workings clearly. Marks are awarded for method.
  3. Round monetary values to two decimal places where appropriate.
  4. This quiz focuses on Inventory Valuation (FIFO, AVCO), Inventory Control, and related financial statement impacts.

Section A: Multiple Choice & Short Concepts (10 Marks)

Answer all questions in this section. Each question carries 1 mark unless stated otherwise.

1. Which accounting concept requires inventory to be valued at the lower of cost and net realizable value? A. Consistency B. Prudence C. Accruals D. Business Entity

2. In a period of rising prices, which inventory valuation method will result in the highest closing inventory value? A. FIFO (First-In, First-Out) B. AVCO (Weighted Average Cost) C. LIFO (Last-In, First-Out) D. Specific Identification

3. Under the AVCO (perpetual) method, when is the weighted average cost per unit recalculated? A. At the end of the financial year only. B. Every time a sale is made. C. Every time a purchase is made. D. When the inventory count is performed.

4. Goods held on consignment should be included in the inventory of: A. The consignor (owner). B. The consignee (holder). C. Both the consignor and consignee. D. Neither party until sold.

5. If closing inventory is overstated by 500,whatistheeffectontheGrossProfitfortheyear?A.Understatedby500, what is the effect on the Gross Profit for the year? A. Understated by 500 B. Overstated by 500C.NoeffectD.Overstatedby500 C. No effect D. Overstated by 1,000

6. Which of the following costs should not be included in the cost of inventory? A. Import duties B. Carriage inwards C. Storage costs for finished goods awaiting sale D. Direct labour costs for manufacturing

7. Net Realizable Value (NRV) is defined as: A. Selling price less cost of sales. B. Selling price less costs to complete and sell. C. Cost price less depreciation. D. Market value plus profit margin.

8. A business uses the FIFO method. If prices are falling, the Cost of Sales will be: A. Higher than under AVCO. B. Lower than under AVCO. C. The same as under AVCO. D. Unaffected by price changes.

9. Which error would cause the Trial Balance to disagree? A. Omitting a purchase invoice completely. B. Recording a purchase in the Sales Journal. C. Calculating the closing inventory figure incorrectly. D. Posting the correct amount to the wrong personal account.

10. In the Statement of Financial Position, inventory is classified as a: A. Non-Current Asset B. Current Liability C. Current Asset D. Equity

Section B: FIFO and AVCO Calculations (24 Marks)

11. FIFO Valuation TechParts Pte Ltd trades in electronic components. The following transactions occurred in March 2026:

DateTransactionUnitsUnit Cost ($)
1 MarOpening Inventory10010.00
5 MarPurchase20011.00
12 MarSale150-
20 MarPurchase10012.00
28 MarSale180-

(a) Calculate the value of the Closing Inventory at 31 March 2026 using the FIFO method. [4 marks]

(b) Calculate the Cost of Sales for March 2026 using the FIFO method. [2 marks]

<br> <br> <br> <br>

12. AVCO (Perpetual) Valuation Using the same data for TechParts Pte Ltd in Question 11:

DateTransactionUnitsUnit Cost ($)
1 MarOpening Inventory10010.00
5 MarPurchase20011.00
12 MarSale150-
20 MarPurchase10012.00
28 MarSale180-

(a) Calculate the weighted average cost per unit after the purchase on 5 March. Show your answer to two decimal places. [2 marks]

(b) Calculate the value of the Closing Inventory at 31 March 2026 using the Perpetual AVCO method. Show all workings. [6 marks]

<br> <br> <br> <br> <br> <br>

13. Comparison of Methods Bella’s Boutique had the following data for the year ended 31 December 2025:

  • Revenue: $80,000
  • Opening Inventory: $5,000
  • Purchases: $45,000
  • Closing Inventory (FIFO): $8,000
  • Closing Inventory (AVCO): $7,200

(a) Calculate the Gross Profit using the FIFO method. [2 marks]

(b) Calculate the Gross Profit using the AVCO method. [2 marks]

(c) Explain why the Gross Profit differs between the two methods in a period of rising prices. [2 marks]

<br> <br> <br> <br>

14. Inventory Control Account Prepare the Inventory Account for TechParts Pte Ltd for March 2026 using the FIFO values calculated in Question 11. Bring down the closing balance. [4 marks]

<br> <br> <br> <br> <br> <br>

Section C: Adjustments and Analysis (16 Marks)

15. Lower of Cost and NRV A retailer holds four types of smartphones. Details at 31 December 2025 are as follows:

ItemCost per unit ($)NRV per unit ($)Quantity
Model A40042010
Model B35033015
Model C5005108
Model D20018020

Calculate the total value of inventory to be shown in the Statement of Financial Position, applying the "lower of cost and NRV" rule to each item individually. [4 marks]

<br> <br> <br> <br>

16. Impact of Errors The closing inventory of a business was incorrectly valued at 12,000insteadofthecorrectfigureof12,000 instead of the correct figure of 10,000.

(a) State the effect of this error on the Net Profit for the current year. [1 mark]

(b) State the effect of this error on the Current Assets in the Statement of Financial Position at year-end. [1 mark]

(c) Assuming the error is not corrected, state the effect on the Net Profit of the following year. [1 mark]

<br> <br> <br>

17. Ratio Analysis The following extracts are from the financial statements of GreenGrocers Ltd:

2024 ($)2025 ($)
Revenue500,000600,000
Cost of Sales300,000380,000
Opening Inventory40,00050,000
Closing Inventory50,00070,000

(a) Calculate the Inventory Turnover Ratio (times) for 2025. [2 marks]

(b) Calculate the Days Sales in Inventory for 2025. Use 365 days in a year. Show your answer to one decimal place. [2 marks]

(c) The industry average for Days Sales in Inventory is 45 days. Comment on GreenGrocers’ efficiency in managing inventory in 2025. [2 marks]

<br> <br> <br> <br>

18. Conceptual Application Explain why a business might choose to use the AVCO method rather than FIFO. Provide two reasons. [3 marks]

<br> <br> <br>

19. Consignment Inventory On 30 June 2026, Alpha Ltd sent goods costing 5,000toBetaLtdonconsignment.By30June2026,BetaLtdhadsold605,000 to Beta Ltd on consignment. By 30 June 2026, Beta Ltd had sold 60% of these goods. Alpha Ltd’s own inventory count (excluding consignment) was 20,000.

Calculate the total inventory value Alpha Ltd should report in its Statement of Financial Position as at 30 June 2026. [2 marks]

<br> <br>

20. Decision Making A business is experiencing cash flow difficulties. Its Inventory Turnover ratio has decreased from 8 times to 5 times over the last year.

Suggest two actions the business could take to improve its inventory management and cash flow. [2 marks]

<br> <br> <br>

*** End of Quiz ***

Answers

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

Total Marks: 50

Section A: Multiple Choice & Short Concepts (10 Marks)

1. B (Prudence)

  • Reasoning: Prudence ensures assets are not overstated. Inventory is valued at the lower of cost and NRV to prevent overstatement of profit and assets.

2. A (FIFO)

  • Reasoning: In rising prices, the earliest (cheaper) goods are sold first, leaving the latest (more expensive) goods in closing inventory. Thus, FIFO yields higher closing inventory value.

3. C (Every time a purchase is made)

  • Reasoning: In perpetual AVCO, a new weighted average is calculated after every purchase to determine the cost of subsequent sales.

4. A (The consignor)

  • Reasoning: Legal ownership remains with the consignor until the goods are sold by the consignee.

5. B (Overstated by $500)

  • Reasoning: Cost of Sales = Opening Inv + Purchases - Closing Inv. If Closing Inv is higher, Cost of Sales is lower, making Gross Profit higher.

6. C (Storage costs for finished goods awaiting sale)

  • Reasoning: Storage costs for finished goods are selling/distribution expenses, not part of the cost of bringing inventory to its present location and condition. Import duties, carriage inwards, and direct labour are included.

7. B (Selling price less costs to complete and sell)

  • Reasoning: This is the standard definition of Net Realizable Value.

8. A (Higher than under AVCO)

  • Reasoning: In falling prices, FIFO sells the older (higher cost) goods first. AVCO averages the high and low costs. Therefore, FIFO Cost of Sales is higher.

9. C (Calculating the closing inventory figure incorrectly)

  • Reasoning: Closing inventory is adjusted in the Trading Account/Income Statement but is not a double-entry ledger balance in the Trial Balance (unless using a perpetual system where it's an asset account, but typically in O-Level context, the adjustment figure is derived outside the TB). However, strictly speaking, if the Inventory Account balance is wrong in a perpetual system, the TB disagrees. But usually, "Closing Inventory" in O-Level questions refers to the adjustment figure. Let's look at the other options: A (Omission) - TB agrees. B (Prime Entry Error) - TB agrees (double entry still balances). D (Commission) - TB agrees. C is the only one that typically involves a figure derived outside the double-entry ledger checks or a suspense account situation if the asset account is forced. Correction for O-Level Context: Usually, Closing Inventory is not in the Trial Balance. It is an adjustment. If the value is wrong, the Financial Statements are wrong, but the Trial Balance (which lists ledger balances) might still balance if the Inventory Ledger Account wasn't updated yet. However, if we assume a perpetual system where Inventory is a ledger account, an incorrect balance causes a disagreement if not matched by an entry. Among the choices, A, B, and D definitely do not affect the TB agreement. C is the most likely candidate for a discrepancy if the asset account is included in the TB.

10. C (Current Asset)

  • Reasoning: Inventory is expected to be sold within one year.

Section B: FIFO and AVCO Calculations (24 Marks)

11. FIFO Valuation

(a) Closing Inventory Value

  • Total Units Available: 100+200+100=400100 + 200 + 100 = 400 units.
  • Total Units Sold: 150+180=330150 + 180 = 330 units.
  • Closing Units: 400−330=70400 - 330 = 70 units.
  • Under FIFO, closing inventory consists of the most recent purchases.
  • The last purchase was 100 units @ $12.00.
  • We have 70 units remaining, all from this batch.
  • Value = 70 \text{ units} \times \12.00 = $840$.
  • [4 marks]: 1 mark for identifying remaining units (70), 1 mark for identifying correct batch (last purchase), 1 mark for calculation, 1 mark for final answer.

(b) Cost of Sales

  • Method 1: Opening Inv + Purchases - Closing Inv
    • Opening: 100 \times 10 = \1,000$
    • Purchases: (200 \times 11) + (100 \times 12) = \2,200 + $1,200 = $3,400$
    • Goods Available for Sale: \4,400$
    • Less Closing Inv: \840$
    • Cost of Sales: \4,400 - $840 = $3,560$.
  • Method 2: Sum of specific costs sold
    • Sale 1 (150 units): 100 @ 10+50@10 + 50 @ 11 = 1,000+1,000 + 550 = $1,550
    • Sale 2 (180 units): 150 @ 11(remainingfrom2ndbatch)+30@11 (remaining from 2nd batch) + 30 @ 12 = 1,650+1,650 + 360 = $2,010
    • Total COS: 1,550+1,550 + 2,010 = $3,560.
  • [2 marks]: 1 mark for workings, 1 mark for correct answer.

12. AVCO (Perpetual) Valuation

(a) Weighted Average Cost after 5 March Purchase

  • Opening: 100 units @ 10.00=10.00 = 1,000
  • Purchase: 200 units @ 11.00=11.00 = 2,200
  • Total Value: $3,200
  • Total Units: 300
  • Average Cost: \3,200 / 300 = $10.666...$
  • Answer: $10.67 (rounded to 2 d.p.)
  • [2 marks]: 1 mark for total value/units, 1 mark for correct rounded answer.

(b) Closing Inventory Value (Perpetual AVCO)

  • 12 Mar Sale (150 units):
    • Cost of Sale: 150 \times \10.666... = $1,600$
    • Remaining Units: 300−150=150300 - 150 = 150 units.
    • Remaining Value: \3,200 - $1,600 = $1,600(or(or150 \times 10.666...$).
  • 20 Mar Purchase (100 units @ $12.00):
    • New Units: 150+100=250150 + 100 = 250 units.
    • New Value: \1,600 + (100 \times 12) = $1,600 + $1,200 = $2,800$.
    • New Average Cost: \2,800 / 250 = $11.20$.
  • 28 Mar Sale (180 units):
    • Cost of Sale: 180 \times \11.20 = $2,016$.
    • Remaining Units: 250−180=70250 - 180 = 70 units.
    • Remaining Value: 70 \times \11.20 = $784$.
  • Closing Inventory Value: $784.
  • [6 marks]: 1 mark for avg cost after 1st purchase, 1 mark for value after 1st sale, 1 mark for new total value after 2nd purchase, 1 mark for new avg cost, 1 mark for final units, 1 mark for final value.

13. Comparison of Methods

(a) Gross Profit (FIFO)

  • Cost of Sales = Opening (5,000)+Purchases(5,000) + Purchases (45,000) - Closing (8,000)=8,000) = 42,000.
  • Gross Profit = Revenue (80,000)−COS(80,000) - COS (42,000) = $38,000.
  • [2 marks]

(b) Gross Profit (AVCO)

  • Cost of Sales = Opening (5,000)+Purchases(5,000) + Purchases (45,000) - Closing (7,200)=7,200) = 42,800.
  • Gross Profit = Revenue (80,000)−COS(80,000) - COS (42,800) = $37,200.
  • [2 marks]

(c) Explanation

  • In a period of rising prices, FIFO assigns older, lower costs to Cost of Sales, resulting in lower COS and higher Gross Profit. AVCO averages the costs, resulting in a higher COS (compared to FIFO) and lower Gross Profit.
  • [2 marks]: 1 mark for referencing rising prices/cost flow, 1 mark for linking to profit difference.

14. Inventory Account (FIFO)

Inventory Account

DateDetails$DateDetails$
Mar 1Balance b/d1,000Mar 12Cost of Sales1,550
Mar 5Bank/Payables2,200Mar 28Cost of Sales2,010
Mar 20Bank/Payables1,200Mar 31Balance c/d840
4,4004,400
Apr 1Balance b/d840
  • [4 marks]: 1 mark for correct format (T-account), 1 mark for correct debits (Op Bal + Purchases), 1 mark for correct credits (COS + Cl Bal), 1 mark for balancing. Note: COS figures must match Q11(b) workings (1,550+1,550 + 2,010 = $3,560).

Section C: Adjustments and Analysis (16 Marks)

15. Lower of Cost and NRV

  • Model A: Cost 400<NRV400 < NRV 420 -> Use **400∗∗.Value:400**. Value: 10 \times 400 = $4,000$.
  • Model B: Cost 350>NRV350 > NRV 330 -> Use **330∗∗.Value:330**. Value: 15 \times 330 = $4,950$.
  • Model C: Cost 500<NRV500 < NRV 510 -> Use **500∗∗.Value:500**. Value: 8 \times 500 = $4,000$.
  • Model D: Cost 200>NRV200 > NRV 180 -> Use **180∗∗.Value:180**. Value: 20 \times 180 = $3,600$.
  • Total Inventory Value = 4,000 + 4,950 + 4,000 + 3,600 = \mathbf{\16,550}$.
  • [4 marks]: 1 mark for correct selection of lower value for each item, 1 mark for total calculation. (Deduct 0.5 for each wrong item selection).

16. Impact of Errors

(a) Net Profit is Overstated by $2,000.

  • Reasoning: Closing Inv overstated by 2,000−>COSunderstatedby2,000 -> COS understated by 2,000 -> Profit overstated by $2,000.
  • [1 mark]

(b) Current Assets are Overstated by $2,000.

  • Reasoning: Inventory is a current asset.
  • [1 mark]

(c) Net Profit of the following year is Understated by $2,000.

  • Reasoning: This year's overstated closing inventory becomes next year's overstated opening inventory. Higher Opening Inv -> Higher COS -> Lower Profit.
  • [1 mark]

17. Ratio Analysis

(a) Inventory Turnover Ratio (2025)

  • Average Inventory = (Opening 50,000+Closing50,000 + Closing 70,000) / 2 = $60,000.
  • Cost of Sales = $380,000.
  • Inventory Turnover = 380,000/60,000=6.33380,000 / 60,000 = \mathbf{6.33} times.
  • [2 marks]: 1 mark for avg inv, 1 mark for final ratio.

(b) Days Sales in Inventory (2025)

  • Days = 365 / Inventory Turnover
  • Days = 365/6.333...=57.63...365 / 6.333... = 57.63...
  • Answer: 57.6 days.
  • [2 marks]: 1 mark for formula/application, 1 mark for correct rounding.

(c) Comment

  • GreenGrocers takes 57.6 days to sell inventory, which is significantly higher than the industry average of 45 days. This indicates inefficiency in inventory management. They may be holding excess stock, facing obsolescence, or having slow sales. This ties up cash that could be used elsewhere.
  • [2 marks]: 1 mark for comparison (higher/slower), 1 mark for implication (inefficiency/cash flow impact).

18. Conceptual Application (AVCO vs FIFO)

  • Reason 1: Smoothing Effect: AVCO smooths out price fluctuations, providing a more stable cost of sales and profit figure, which is useful for management planning.
  • Reason 2: Administrative Simplicity (in some systems): For businesses with large volumes of identical items where tracking specific batches (FIFO) is difficult or costly, AVCO is easier to apply, especially if using a periodic system.
  • Reason 3: Middle-ground valuation: It represents a middle ground between the extreme valuations of FIFO and LIFO (if LIFO were permitted), often reflecting the actual physical flow of mixed goods.
  • [3 marks]: 1.5 marks per valid reason with explanation.

19. Consignment Inventory

  • Alpha Ltd is the consignor (owner).
  • Unsold goods = 40% of 5,000=5,000 = 2,000.
  • Alpha's own inventory = $20,000.
  • Total Inventory = 20,000+20,000 + 2,000 = $22,000.
  • [2 marks]: 1 mark for calculating unsold consignment stock, 1 mark for total.

20. Decision Making

  • Action 1: Reduce Prices / Sales Promotion: To clear old stock and increase turnover, thereby generating cash.
  • Action 2: Review Purchasing Policy: Order smaller quantities more frequently to avoid overstocking and reduce holding costs.
  • Action 3: Discontinue Slow-Moving Items: Stop stocking products that do not sell well.
  • [2 marks]: 1 mark per valid, distinct action.