Solutions to Assignments
MBA and MBA (Banking & Finance)
MMPC 004 - Accounting for Managers
MMPC-004/TMA/JULY/2022
Question No. 2. Explain the following
(a) Marginal Costing
(b) Activity Based Costing
Solution:
a) Marginal Costing
Marginal costing in economics and managerial accounting refers to an increase or decrease in the total cost of production due to a change in the quantity of the desired output. It is variable, depending on the inclusion of resources required to produce or deliver additional unit(s) of a product or service.
Calculating marginal cost enables managers to make decisions on resource allocation, optimize the production and operation, control manufacturing costs, plan budget and profits, etc. It considers expenses incurred at each production stage, except for overhead pricing. The practice is common in manufacturing industries, allowing companies to achieve economies of scale.
Definition: Marginal Costing is a costing technique wherein the marginal cost, i.e. variable cost
is charged to units of cost, while the fixed cost for the period is completely written off against the
contribution.
Marginal cost is the change in the total cost when the quantity produced is incremented by one.
That is, it is the cost of producing one more unit of a good.
For example, let us suppose:
Variable cost per unit = Rs 25
Fixed cost = Rs 1,00,000
Cost of 10,000 units = 25 × 10,000 = Rs 2,50,000
Total Cost of 10,000 units = Fixed Cost + Variable Cost
= 1,00,000 + 2,50,000
= Rs 3,50,000
Total cost of 10,001 units = 1,00,000 + 2,50,025
= Rs 3,50,025
Marginal Cost = 3,50,025 – 3,50,000
= Rs 25
The term marginal cost implies the additional cost involved in producing an extra unit of
output, which can be reckoned by total variable cost assigned to one unit. It can be calculated as:
Marginal Cost = Direct Material + Direct Labor + Direct Expenses + Variable Overheads
Characteristics of Marginal Costing
- Classification into Fixed and Variable Cost: Costs are bifurcated, on the basis of variability
into fixed cost and variable costs. In the same way, semi variable cost is separated.
- Valuation of Stock: While valuing the finished goods and work in progress, only variable
cost are taken into account. However, the variable selling and distribution overheads are not
included in the valuation of inventory.
- Determination of Price - the prices are determined on the basis of the marginal cost and marginal contribution.
- Profitability - the ascertainment of departmental and product's profitability is based on the contribution margin.
Features of Marginal Costing
Features of marginal costing are as follows:
Marginal costing is used to know the impact of variable cost on the volume of production
or output.
Break-even analysis is an integral and important part of marginal costing.
Contribution of each product or department is a foundation to know the profitability of
the product or department.
Addition of variable cost and profit to contribution is equal to selling price.
Marginal costing is the base of valuation of stock of finished product and work in
progress.
Fixed cost is recovered from contribution and variable cost is charged to production.
Costs are classified on the basis of fixed and variable costs only. Semi-fixed prices are
also converted either as fixed cost or as variable cost.
Ascertainment of Profit under Marginal Cost
‘Contribution’ is a fund that is equal to the selling price of a product less marginal cost.
Contribution may be described as follows:
Contribution = Selling Price – Marginal Cost
Contribution = Fixed Expenses + Profit
Contribution – Fixed Expenses = Profit
Marginal Costing Approach
The difference between product costs and period costs forms a basis for marginal costing
technique, wherein only variable cost is considered as the product cost while the fixed cost is
deemed as a period cost, which incurs during the period, irrespective of the level of activity.
Facts Concerning Marginal Costing
Cost Ascertainment: The basis for ascertaining cost in marginal costing is the nature of cost,
which gives an idea of the cost behavior, that has a great impact on the profitability of the
firm.
Special technique: It is not a unique method of costing, like contract costing, process costing,
batch costing. But, marginal costing is a different type of technique, used by the managers for
the purpose of decision making. It provides a basis for understanding cost data so as to gauge
the profitability of various products, processes and cost centers.
Decision Making: It has a great role to play, in the field of decision making, as the changes in
the level of activity pose a serious problem to the management of the undertaking.
Marginal Costing assists the managers in taking end number of business decisions, such as
replacement of machines, discontinuing a product or service, etc. It also helps the management in
ascertaining the appropriate level of activity, through break even analysis, that reflect the impact
of increasing or decreasing production level, on the company’s overall profit.
Advantages of Marginal Costing
The advantages of marginal costing are as follows:
Easy to operate and simple to understand.
Marginal costing is useful in profit planning; it is helpful to determine profitability at
different level of production and sale.
It is useful in decision making about fixation of selling price, export decision and make
or buy decision.
Break even analysis and P/V ratio are useful techniques of marginal costing.
Evaluation of different departments is possible through marginal costing.
By avoiding arbitrary allocation of fixed cost, it provides control over variable cost.
Fixed overhead recovery rate is easy.
Under marginal costing, valuation of inventory done at marginal cost. Therefore, it is not
possible to carry forward illogical fixed overheads from one accounting period to the
next period.
Since fixed cost is not controllable in short period, it helps to concentrate in control over
variable cost.
b) Activity Based Costing
Activity-Based Costing (ABC) is a system of costing, where costs are first
traced to activities and then to products. This costing system works with an
assumption that activities are responsible for the costs that are incurred. As
stated earlier, costs are charged to products based on the individual product's
use for each activity.
The Chartered Institute of Management Accountants, UK (CIMA) defines1
ABC as “an approach to the costing and monitoring of activities which
involves tracing resource consumption and costing final outputs. Resources
are assigned to activities, and activities to cost objects based on consumption
estimates. The latter utilise cost drivers to attach activity costs to outputs”.
The important issues of the definition are as follows:
ABC is a tactic to the costing and does monitoring of activities in a
process.
It traces the consumption of resources and then the costing of resultant
outputs.
In this, resources are assigned to activities and then activities to cost
objects based on consumption estimates.
It utilises identified cost drivers to assign activity costs to depicted
outputs.
Another description of Activity-based costing is that it is a two-stage based
costing method that allocates indirect costs and overheads to products and
services.
Some costs are tough to assign to a product or a service. It identifies the
connection between overheads and manufactured products and gives indirect
costs to the products. The method is less arbitrarily than the traditional
costing system.
Features of Activity Based Costing (ABC)
Features of Activity Based Costing are as follows:
ABC is a modern approach to the allocation of indirect costs. Costs
allocated to each activity symbolise the resources consumed by the
activity.
As done in conventional costing, ABC is not restricted to the allocation
of indirect costs to departments. It moves further to identify the
individual activity for indirect cost allocation as the lowest unit.
Based on consumption, resources are allotted to each activity and then to
cost objects.
ABC identifies the activities using the activity cost drivers and results in
a more accurate cost calculation.
This approach facilitates easy identification of cost according to
activities cost driver.
This costing method is suitable if there is more than one product in the
manufacturing line and overheads have a high share in total cost.
This approach creates a straight cause and effect association with various
resources.
Development of Activity Based Costing
Limits of the traditional costing system gave way for the development of
ABC. The traditional arrangement segregates costs into fixed and variable.
As the business grows, the costs become more complex, and then the
traditional approach may not be appropriate for making complex decisions
related to production and developing product strategies.
The traditional methods facilitate financial reporting and primarily put prominence on calculating overhead rates for the valuation of stocks. It was
seen that the traditional absorption costing approach could not go well with
multi-product scenarios, so a change was in line. In fact, multiple-products
scenario or product diversification requires accurate product cost
ascertainment due to increasing market competition within the country and
internationally.
In the 1980s, ABC was first defined by Kaplan and Bruns2
. It was taken as
the modern alternative to absorption costing, which could define product and
profitability in a better way. It provides better information to make more
effective decisions.
OBJECTIVES OF ACTIVITY BASED
COSTING (ABC)
Some objectives of ABC are listed as under:
To recognise several activities in the process of production, including the
activities that add value.
To eliminate the non value-adding activities.
To put emphasis on the high-cost activities
To incorporate activities based on distribution overheads.
To help in decision-making process in the identification of a suitable
price of product and services.
To ensure accurate and precise cost determination of products and
services.
To find options to improve the process and reduction of costs.
MERITS AND DEMERITS OF ACTIVITY
BASED COSTING (ABC)
Merits
Removes Cross Subsidization Issues
The traditional system gives rise to the issues of over and under-costing.
Products may be subject to over-costing, which may result in under
costing of other products. ABC may take care of this issue. ABC put the
role of activities between costs and products and makes the relationship
more explicit.
Deals with Complicated Processes
There have been growth and development in all walks of life, including
production of product and services. Due to this, complications in various
processes have risen in the industries too. Now, there are cross-linkages
in the production process and costing of products. The number of
processes and activities involved in production has increased. ABC
deals with these complications in costing that emerged due to processes.
Product Customisations
Nowadays, production is being done with many variations, in terms of
sizes, design etc. If the production takes place on one premise, the
costing process will need refinement to price the products suitably. ABC
helps here.
Identification of Cost Saving Chances
In ABC, it is easier to identify cost saving opportunities. It considers
costs to all areas, including various processes, products, managerial
responsibility, customers, departments etc. It removes the issues related
to the error of estimation.
In this system, costs are managed in the long run by controlling the activities
that drive them. In other words, the aim is to manage the activities rather
than costs. By managing the forces that cause the activities (cost drivers),
costs will be managed long-term. Collecting and reporting on the significant
activities a business engages in makes it possible to understand and manage
costs more effectively.
Demerits
A Complex System
ABC works with various cost pools and drivers. It is assumed to be more
complex than the traditional system of product costing. This is one of the
demerits. In fact, selection of drivers, common costs, driver rates etc.,
put forward a complex system.
Product and Process should be Fully Known
One of the significant demerits is that the people who are employing
ABC usually require significant experience in the products and processes
of the industry.
ABC is preferred if the firm uses cost-plus pricing, whereas marketbased prices may not favour it.
Rely on a sophisticated system
ABC requires a minimum level of information technology in the
organisation. Much data is needed and processed for implementing a
particular decision. Small and new organisations may not take full
advantage of ABC, due to poor information technology systems.
Consumes a lot of Time and efforts
ABC is a time-consuming process. It comprises a number of steps and a
lot of groundwork to start and complete the process.
Organisations may put time and effort if they get utility out of the
process. As mentioned earlier also, large manufacturing firms can utilise
it better than small firms.
Increase in Indirect Costs
Due to the high involvement of technology in ABC, indirect costs rise
significantly.
PROCESS OF ACTIVITY BASED COSTING
(ABC)
Stages in ABC
Stages of ABC costing are mentioned as follows:
- Identification of the organisational activities and manufacturing
process
For ABC, it is indispensable to study the organisational activities and
manufacturing process to determine the number of stages involved. By
this, all the activities involved in producing the product or service can be
identified. ABC believes that activities cause cost.
- Classify the factors which determine the costs of an activity, known
as cost drivers.
According to CIMA, ‘cost driver is any factor which causes a change in
the cost of an activity, e.g. the quality of parts received by an activity is a
determining factor in the work required by that activity and therefore
affects the resources required. An activity may have multiple cost drivers
associated with it.’’4
As per this definition, in the traditional system of product costing, the
number of cost drivers can be identified as direct labour hours, units
produced, etc. In ABC, cost drivers are related more closely to the
consumption of resources and activities.
As mentioned earlier, ABC considers that activities bring about costs, so
they are linked, and the identified cost drivers are the linkages amid
them.
- Identify the costs of each activity, known as cost pools
The cost pool concept is similar to the concept of the cost centre. CIMA
defines cost pool as ‘the point of focus for the costs relating to a
particular activity in an activity-based costing system. ‘It is the sum total
of the cost elements allotted to an activity. The cost pool is taken as the
point of focus to assign the total cost to an activity.
- Charge costs to the products
It is known that ABC is the method of tracing and assigning costs: from resources to activities and then
from activities to specific products