Cost and Management Accounting, and Financial Statement Analysis
2. Standard costing: the variances that are always asked
Standard costing sets what a cost ought to be and analyses the gap from what it was. Every variance splits the same way — a price or rate part and a quantity or efficiency part — and the sign convention is fixed: favourable when the actual is less than the standard for a cost, adverse when it is more.
| Variance | Formula | What it blames |
|---|---|---|
| Material price | Actual quantity × (standard rate − actual rate) | Purchasing |
| Material usage | Standard rate × (standard quantity for actual output − actual quantity) | The shop floor |
| Labour rate | Actual hours × (standard rate − actual rate) | Wage negotiation and grade mix |
| Labour efficiency | Standard rate × (standard hours for actual output − actual hours) | Supervision and method |
3. Budgetary control and the kinds of budget
A budget is a quantitative plan for a future period; budgetary control is the comparison of actual with budget and the action taken on the difference. The kinds named in the syllabus are distinguished by what they hold constant.
- Fixed budget — drawn for one level of activity and not adjusted when the actual level differs. Useful only where output is stable, because comparing it against a different actual volume compares two unlike things.
- Flexible budget — recast for the level actually achieved by separating fixed from variable cost. This is what makes a variance meaningful, and it is the reason cost behaviour has to be classified before a budget is useful.
- Zero base budgeting — every item must be justified afresh each period rather than carried forward with an increment, so the previous year's figure is not a floor.
- Performance budgeting — expenditure is linked to the output or purpose it buys rather than to the object of spending, so the question becomes what was achieved and not merely what was spent.
4. Process costing and activity based costing
Process costing is used where production is continuous and units are indistinguishable — chemicals, cement, refining — and the cost per unit is the total process cost divided by output. Its distinctive machinery is the treatment of losses and of incomplete units.
- Normal loss is the loss expected in the process. Its cost is absorbed by the good units, so the cost per good unit rises; any scrap value is credited to the process account.
- Abnormal loss is loss beyond that expectation. It is valued at the cost of a good unit and taken to the profit and loss account, so it does not contaminate the product cost.
- Abnormal gain arises when actual loss falls short of normal loss, and is treated as the mirror image — valued at good-unit cost and credited to the profit and loss account.
- Equivalent production converts work in progress into completed-unit equivalents, separately for material, labour and overhead, because a unit half finished for labour may be fully charged with material.
Activity based costing exists because overhead absorbed on a single volume-related base — labour hours, machine hours — systematically overcosts high-volume simple products and undercosts low-volume complex ones. ABC traces overhead to activities, identifies a cost driver for each, and charges products by their consumption of drivers: setups, purchase orders, inspections, engineering changes. The insight is that many overheads are driven by transactions rather than by volume.
5. Decision-making, and the four modern techniques
For a short-run decision only the costs that change with the decision are relevant, so sunk costs are ignored and opportunity costs are added even though no entry records them. Fixed cost is irrelevant unless the decision alters it. Applied to the standard questions: accept a special order if its price exceeds the variable cost and spare capacity exists; make rather than buy if the variable cost of making plus any avoidable fixed cost is less than the purchase price; and when a resource is scarce, rank products by contribution per unit of the scarce resource rather than by contribution per unit sold.
| Technique | The question it answers | When it acts |
|---|---|---|
| Life cycle costing | What does this product cost across its whole life, from design to abandonment? | Across every stage, not one period |
| Target costing | The market sets the price and we set the margin — what is the cost we are allowed? | At the design stage, before production |
| Kaizen costing | How do we shave a little more cost out of an existing process this period? | During manufacture, continuously and in small steps |
| Just in time | How do we produce or procure only as needed, so inventory approaches nil? | In the flow of material, pulled by demand |
6. Ratio, funds flow and cash flow analysis
Ratios group by the question they answer: liquidity, solvency, activity and profitability. The ones the paper returns to are the current ratio and the quick ratio for liquidity, debt-equity and interest coverage for solvency, stock turnover and debtors turnover for activity, and gross profit, net profit and return on capital employed for profitability.
Funds flow and cash flow answer different questions and the paper tests the difference directly. A funds flow statement explains the change in WORKING CAPITAL over a period, so a transaction affecting only current assets and current liabilities — collecting from a debtor, paying a creditor — causes no flow of funds at all. A cash flow statement explains the change in CASH, so those same transactions do appear in it.
AS 3 requires the cash flow statement in three activities. Operating activities are the principal revenue-producing ones; investing activities are the acquisition and disposal of long-term assets and investments; financing activities are those that change the size and composition of owners' capital and borrowings. Interest and dividend received and paid are classified according to whether the entity is a financial enterprise, and the question will say.
Key takeaways
- Contribution is the spine of marginal costing: P/V ratio, break-even, margin of safety and target sales are all rearrangements of contribution = fixed cost + profit.
- In usage and efficiency variances the standard quantity is what the standard allows for the ACTUAL output, not the budgeted quantity — the substitution makes the totals fail to reconcile.
- Normal loss is absorbed by the good units and raises their cost; abnormal loss and abnormal gain are valued at good-unit cost and taken to profit and loss.
- Target costing acts at design, before a unit is made; Kaizen acts during manufacture in small continuous steps. They differ by when, not by how much.
- Funds flow explains the change in working capital, so a transaction within current items causes no flow; cash flow explains the change in cash, so the same transaction does appear.
Practice questions (9)
Attempt each one before opening the answer. Every explanation names the tempting wrong option as well as the right one, because that is where marks are lost.
Sales are ₹8,00,000, variable cost ₹4,80,000 and fixed cost ₹2,40,000. The break-even sales are:
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Answer: A — ₹6,00,000
Contribution is sales minus variable cost, ₹8,00,000 − ₹4,80,000 = ₹3,20,000, so the P/V ratio is 3,20,000 ÷ 8,00,000 = 0.40. Break-even sales are fixed cost divided by the P/V ratio, ₹2,40,000 ÷ 0.40 = ₹6,00,000. The figure ₹4,00,000 comes from dividing fixed cost by the variable cost ratio of 0.60 instead, and ₹7,20,000 from adding fixed cost to variable cost, which is the total cost at the given volume rather than a break-even point. Profit here is ₹80,000, so the margin of safety is ₹2,00,000, which checks out as profit ÷ P/V ratio.In process costing, the cost of normal loss is:
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Answer: A — Absorbed by the good units, raising the cost per good unit
Normal loss is the loss the process is expected to incur, so it is a cost of producing the good output and is absorbed by it — the total process cost is spread over fewer units and the cost per good unit rises. Any scrap value realised on the normal loss is credited to the process account, reducing that absorbed cost. Abnormal loss, which is the loss beyond expectation, is the item valued at good-unit cost and taken to the profit and loss account, and abnormal gain is its mirror image. Swapping the treatment of normal and abnormal loss is the standard error here.Target costing differs from Kaizen costing chiefly in that target costing operates:
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Answer: A — At the design stage, before production begins
Target costing starts from the price the market will bear, subtracts the margin the firm requires and derives the cost it is allowed, then designs the product to meet it — acting before anything is made, at the stage where most cost is committed rather than incurred. Kaizen costing works in the opposite place: production is already running and cost is reduced in small continuous steps. Both reduce cost and both originate in Japanese practice, which is why they are confused, but the distinguishing word in any question is when the reduction happens.Cash collected from a debtor is recorded. Its effect is:
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Answer: A — No flow of funds, but a cash inflow
A funds flow statement explains the change in working capital, and working capital is current assets minus current liabilities. Collecting from a debtor converts one current asset, debtors, into another current asset, cash, leaving working capital exactly as it was — so there is no flow of funds. A cash flow statement explains the change in cash alone, and cash has plainly risen, so the transaction is an inflow there. The pair of statements is routinely tested on precisely this kind of transaction, where the two answers differ.The material usage variance is computed as:
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Answer: A — Standard rate × (standard quantity for actual output − actual quantity)
The usage variance isolates the quantity effect, so it must be valued at the standard rate — using the actual rate would let a price difference leak into a quantity variance. The quantity compared against actual consumption is what the standard allows for the output actually produced, not the quantity budgeted for the planned output; substituting the budgeted figure folds a volume difference into the usage variance and the price and usage variances then fail to add up to the total material cost variance. The second option is the price variance, which correctly uses actual quantity and the difference in rates.Activity based costing improves on traditional absorption costing chiefly because it:
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Answer: A — Charges overhead by the cost drivers products actually consume, not by volume alone
Traditional absorption costing spreads overhead on a single volume-related base such as labour hours or machine hours. Where overhead is actually driven by transactions — setups, purchase orders, inspections, engineering changes — that base systematically overcosts high-volume simple products and undercosts low-volume complex ones, because the complex product consumes many transactions per unit while contributing few labour hours. ABC traces overhead to activities and charges each product by its consumption of the relevant driver. It does not remove fixed overhead, does not change stock valuation rules, and coexists with standard costing rather than replacing it.A firm's productive capacity is limited by machine hours. To rank products for the best use of that capacity, it should order them by:
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Answer: A — Contribution per machine hour
When one resource is scarce, that resource and not the unit is what the firm is really allocating, so profitability has to be measured per unit of it. A product with a large contribution per unit may consume so many machine hours that it earns less per hour than a smaller-contribution product that runs quickly. Ranking by contribution per unit therefore gives the wrong order whenever machine hours per unit differ across products. Selling price ignores variable cost entirely, and net profit per unit after fixed cost absorption imports an allocation that is irrelevant to a short-run decision.The quick ratio excludes, from current assets:
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Answer: A — Inventory and prepaid expenses
The quick or acid-test ratio asks whether current liabilities could be met without selling anything, so it keeps only the assets that are cash or can become cash almost immediately at a known amount. Inventory fails that test because it must first be sold, at a price not yet known, and a prepaid expense fails it absolutely because it can only be consumed, never converted. Cash, bank balances, debtors and marketable securities all stay in. A firm with a comfortable current ratio and a weak quick ratio has its liquidity tied up in stock, which is precisely what comparing the two is meant to reveal.A flexible budget differs from a fixed budget in that it is:
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Answer: A — Recast for the level of activity actually achieved
A fixed budget is drawn for one planned level of activity and left there, so comparing it with a different actual volume compares two unlike things and every variance is contaminated by the volume difference. A flexible budget separates fixed from variable cost and is recast for the level actually reached, which is what makes the remaining variances attributable to price and efficiency rather than to output. Neither budget is confined to a five-year cycle, and both are expressed in money as well as in units.