Monday, May 25, 2026

Mocktest on Cost concept


case-based MCQs with answers covering *Basic Cost Accounting – ACCA FMA + US CMA Part 1* topic... Cost concept

All cases are exam-style: 1 scenario → multiple concepts tested.


*CASE 1: “Delta Factory” – Absorption vs Variable + OH + Journal Entries*


*Background:*  

Delta produces chairs. 2026 data:  

Beg WIP = 0. Beg FG = 2,000 units @ $50/unit absorption cost.  

Produced = 20,000 units. Sold = 18,000 units @ $80. End FG = 4,000 units.  

Costs: DM $12/u, DL $8/u, VOH $5/u, Fixed Mfg OH budgeted $200,000. Actual Fixed Mfg OH = $210,000.  

Fixed Non-Mfg = $150,000. Variable selling = $2/u sold.  

OH applied on DL hours. Std DL = 1 hr/u. Actual DL hrs = 19,500 hrs.  

Predetermined OH rate = $200,000 / 20,000 hrs = $10/hr.


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*Q1. ABSORPTION COSTING – Std D.1*  

_Unit product cost under absorption costing?_  

A. $25  B. $35  C. $33  D. $37  


*Answer: B*  

*Rationale:* DM 12 + DL 8 + VOH 5 + Fixed OH 200K/20K = 10 = *$35*. Variable cost = $25.


*Q2. OVER/UNDER APPLIED OH – Std D.2*  

_Over or under-applied Mfg OH?_  

A. $10,000 Over  B. $10,000 Under  C. $15,000 Over  D. $15,000 Under  


*Answer: D*  

*Rationale:* Applied = 19,500 hrs × $10 = $195,000. Actual = $210,000. Actual > Applied = *$15,000 Under-applied*.


*Q3. JOURNAL ENTRY – MATERIAL TO PRODUCTION*  

_DM issued to production $240,000. Correct entry?_  

A. Dr WIP 240K, Cr DM Inventory 240K  

B. Dr DM Inventory 240K, Cr WIP 240K  

C. Dr COGS 240K, Cr DM 240K  

D. Dr MOH 240K, Cr DM 240K  


*Answer: A*  

*Rationale:* Material transferred = WIP increases, DM inventory decreases.


*Q4. DISPOSITION OF SIGNIFICANT UNDER-APPLIED OH*  

_Under-applied $15,000 is significant. Correct disposition?_  

A. Close to COGS only  

B. Prorate to WIP, FG, COGS  

C. Close to P&L as period cost  

D. Add to Fixed OH next year  


*Answer: B*  

*Rationale:* GAAP/CMA: If _significant_, prorate to WIP, FG, COGS based on OH in ending balances. If immaterial → COGS only.


*Q5. VARIABLE COSTING NOI*  

_If absorption NOI = $350,000, what is variable costing NOI?_  

A. $370,000  B. $330,000  C. $350,000  D. $390,000  


*Answer: B*  

*Rationale:* Inventory ↑ by 2,000 units = 4,000 – 2,000. Absorption defers 2,000 × $10 fixed OH = $20,000. So Variable NOI = 350K – 20K = *$330,000*.


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*CASE 2: “Omega Parts” – Cost Concepts + Decision Making*


*Background:*  

Omega makes Part X. Current supplier cost = $40/u. Make in-house: DM $15, DL $10, VOH $5, Allocated fixed OH $12. Idle capacity exists. Old machine NBV = $50,000, scrap = $5,000. If make, need new jig $30,000 usable 3 yrs. Manager salary $60,000 unavoidable.


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*Q6. RELEVANT COST – MAKE OR BUY*  

_Relevant unit cost to make?_  

A. $42  B. $30  C. $40  D. $102  


*Answer: B*  

*Rationale:* Relevant = DM 15 + DL 10 + VOH 5 = *$30*. Fixed OH $12 is allocated, not incremental. Manager salary sunk. Jig = $30K/assume units, but CMA usually asks unit incremental → jig is relevant but not per unit unless volume given. Old machine NBV sunk, scrap $5K is opportunity cost of _keep_, not make. Buy = $40. Make $30 < Buy $40.


*Q7. SUNK COST*  

_Which is sunk?_  

A. New jig $30,000  B. Old machine NBV $50,000  C. Manager salary $60,000  D. Both B & C  


*Answer: D*  

*Rationale:* Sunk = past cost, unavoidable. NBV of old machine + unavoidable salary are sunk. Jig is future, relevant.


*Q8. OPPORTUNITY COST*  

_If Omega can rent idle space for $8,000 if they buy, what is opportunity cost of making?_  

A. $0  B. $8,000  C. $5,000  D. $50,000  


*Answer: B*  

*Rationale:* By making, you forgo $8,000 rent. That’s opportunity cost of make decision.


*Q9. ENGINEERED vs DISCRETIONARY COST*  

_DL $10/u is what type? Fixed OH allocated $12 is?_  

A. Engineered, Engineered  B. Engineered, Discretionary  C. Discretionary, Engineered  D. Discretionary, Discretionary  


*Answer: B*  

*Rationale:* Engineered = clear input-output relation → DL, DM. Discretionary = management judgment, no optimal amount → Advertising, R&D, allocated fixed OH.


*Q10. PRIME COST vs CONVERSION COST*  

_Prime cost per unit = ? Conversion cost = ?_  

A. $25, $15  B. $25, $27  C. $15, $27  D. $27, $25  


*Answer: B*  

*Rationale:* Prime = DM 15 + DL 10 = *$25*. Conversion = DL 10 + VOH 5 + FOH 12 = *$27* under absorption.


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*CASE 3: “Beta Textiles” – Inventory + Purchases + Ratios*


*Background:*  

Sales = $1,000,000. Gross Profit = 40%. Beg Inventory = $80,000. Purchases = $620,000.  

Purchase docs used: Purchase Requisition, PO, Goods Received Note, Supplier Invoice.  

Slow moving inventory = $30,000. Skilled labor rate $25/hr, Unskilled $15/hr.


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*Q11. COGS & END INVENTORY*  

_COGS = ? End Inventory = ?_  

A. $600K, $100K  B. $400K, $300K  C. $600K, $300K  D. $400K, $100K  


*Answer: A*  

*Rationale:* GP 40% → COGS = 60% × 1M = *$600,000*. End Inv = Beg 80K + Purch 620K – COGS 600K = *$100,000*.


*Q12. INVENTORY TURNOVER*  

_Inventory Turnover = ?_  

A. 6.0  B. 6.67  C. 10.0  D. 12.5  


*Answer: B*  

*Rationale:* Avg Inv = (80K+100K)/2 = $90K. Turnover = COGS/Avg Inv = 600K/90K = *6.67 times*.


*Q13. SLOW MOVING INVENTORY RISK*  

_$30K slow moving = 30% of end inv. Impact?_  

A. Overstates profit  B. Risk of obsolescence, need write-down  C. Improves turnover  D. No impact  


*Answer: B*  

*Rationale:* Slow moving → NRV < Cost → IAS 2 requires write-down. Affects efficiency + economy.


*Q14. PURCHASE DOCUMENTS – Std E.1*  

_Which document authorizes supplier to ship?_  

A. Purchase Requisition  B. Purchase Order  C. GRN  D. Invoice  


*Answer: B*  

*Rationale:* PO = legal offer to supplier. PR = internal request. GRN = receipt proof. Invoice = billing.


*Q15. SKILLED vs UNSKILLED LABOUR*  

_Using unskilled for skilled job causes?_  

A. Lower rate variance favorable  B. Higher efficiency variance unfavorable  C. Lower quality, rework  D. B & C  


*Answer: D*  

*Rationale:* Rate F but efficiency U, quality ↓. Economy vs Effectiveness trade-off.


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*CASE 4: “Gamma Ltd” – High-Low + Relevant Range + Throughput*


*Background:*  

Month 1: 5,000 units, Total cost $70,000. Month 6: 8,000 units, $94,000.  

Relevant range = 4,000–9,000 units. Capacity constraint = Machine X, 2 min/unit. Selling price $25, DM $8/u.  

Joint process: Product A & B from crude oil. B is by-product sold for $2/u.


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*Q16. HIGH-LOW METHOD*  

_Variable cost per unit = ? Fixed cost = ?_  

A. $8, $30K  B. $8, $24K  C. $12, $10K  D. $10, $20K  


*Answer: A*  

*Rationale:* VC/u = (94K–70K)/(8K–5K) = 24K/3K = *$8*. Fixed = 70K – 5K×8 = *$30,000*.


*Q17. RELEVANT RANGE*  

_If Gamma plans 10,000 units next month, high-low estimate reliable?_  

A. Yes  B. No, outside relevant range  C. Yes if linear  D. Only for fixed  


*Answer: B*  

*Rationale:* 10,000 > 9,000 max relevant range. Cost behavior may change → step-fixed costs.


*Q18. THROUGHPUT*  

_Throughput per minute of constraint = ?_  

A. $8.50  B. $12.50  C. $17.00  D. $25.00  


*Answer: A*  

*Rationale:* Throughput = SP – DM = 25 – 8 = $17/u. 2 min/u → $17/2 = *$8.50/min*.


*Q19. JOINT PRODUCT vs BY-PRODUCT*  

_Accounting for by-product B: sales $2/u. Best treatment?_  

A. Joint cost allocation  B. Credit production cost of A  C. Treat as other income  D. B or C acceptable  


*Answer: D*  

*Rationale:* By-product immaterial → either reduce joint cost = credit to production cost, or show as other income. CMA accepts both.


*Q20. COST FLOW – JOURNAL FOR PRODUCTION COMPLETED*  

_WIP to FG $500,000. Entry?_  

A. Dr FG 500K, Cr WIP 500K  

B. Dr WIP 500K, Cr FG 500K  

C. Dr COGS 500K, Cr WIP 500K  

D. Dr MOH 500K, Cr WIP 500K  


*Answer: A*  

*Rationale:* Goods completed → FG ↑, WIP ↓.


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*CASE 5: “Retail Co” – Margin, Markup, Trading Partners*


*Background:*  

Cost = $60, Selling Price = $100. Credit customer owes $20,000. Vendor owes rebate $5,000.


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*Q21. PROFIT MARGIN vs MARKUP*  

_Profit margin % = ? Markup % = ?_  

A. 40%, 66.67%  B. 60%, 40%  C. 40%, 40%  D. 66.67%, 40%  


*Answer: A*  

*Rationale:* Margin = (100–60)/100 = *40% on sales*. Markup = (100–60)/60 = *66.67% on cost*.


*Q22. TRADING PARTNER vs VENDOR vs CUSTOMER*  

_The entity owing $20,000 is? Entity giving rebate $5,000 is?_  

A. Vendor, Customer  B. Customer, Vendor  C. Trading Partner, Trading Partner  D. Both B & C  


*Answer: D*  

*Rationale:* Customer owes you = A/R. Vendor owes rebate = A/P debit. Both are “trading partners” umbrella term.


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*KEY DEFINITIONS – QUICK RECAP*

**Term** **Definition** **CMA Test Point**

**Inventoriable Cost** Product costs: DM, DL, Mfg OH. Go to inventory until sold Absorption vs Variable

**Production OH** Indirect mfg costs: rent, depreciation of factory Allocated, over/under applied

**Non-Production OH** Selling, Admin costs Period cost always

**Economy** Acquiring inputs at lowest cost Price variance

**Efficiency** Max output from inputs Quantity/Efficiency variance

**Effectiveness** Achieving objectives Sales volume variance, quality

**Relevant Range** Activity level where fixed/variable behavior holds High-low invalid outside

**Short Run** At least one factor of production fixed Fixed costs exist

**Factors of Production** Land, Labor, Capital, Enterprise Variable vs Fixed in SR

*Advice for ACCA FMA + CMA Part 1:*  

1. *Journal entries*: WIP → FG → COGS flow is 20% of Part 1 cost questions

2. *Over/Under OH*: Always test “significant vs immaterial” rule

3. *Relevant costing*: Ignore sunk, allocated fixed, depreciation. Only incremental + opportunity

4. *Ratios*: Inventory turnover = COGS/Avg Inv. Slow moving → check NRV

5. *Definitions*: CMA loves Engineered vs Discretionary, Prime vs Conversion


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