# Electronic Control System, Kaplan Kit.

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This topic contains 4 replies, has 2 voices, and was last updated by  Vipin 2 years, 11 months ago.

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• acca13
Participant

Hi

Companies RP, RR, RS and RT are members of a group, RP wishes to buy an electronic control system for its factory and, in accordance with group policy, must obtain quotations from companies inside and outside of the group.

From outside of the group the following quotations are received:

a) Company A quoted \$33,200
b) Company B quoted \$35,000 but would buy a special unit from RS for \$13000. To make this unit, however, RS would need to buy parts from IIk at a price of \$7500.

The inside quotation was from RS whose price was \$48000. This would require RS buying parts from RR at a price of \$8000 and units from RT at a price of \$30,000. However , RT would need to buy parts from RR at a price of \$11,000.

1- RR is extremely busy with work outside the group and has quoted current market prices for all of its products

2- RS costs for the RP contract, including purchases from RR and RT , total \$42,000. For the company B contract it expects a profit of 25% on the cost of its own work

3- RT prices provide for a 20% profit margin on total costs

4- The variable costs of the group companies in respect of the work under consideration are:

RR: 20% of selling price
RS: 70% of own cost (excluding purchases from from other group companies)
RT: 65% of own cost (excluding purchases from other group companies).

Required: which contract to be accepted.

In the sloution, the part I don’t get is how they calculated relevant cost of RS and RT:

Relevant cost of RT:
(125% * own costs) + 7500 = 13000

therefore own costs = 5500/1.25 = 4400

Relevant cost of RT:
Total cost = \$30,000 (20% margin on cost) = \$25000
Less: transferred cost from RR (11000)
own cost = 14000
variable cost to group = 14000* 65% = (9100)
Relevant cost of RS: 42000 – ( 30,000 + 8000) = 2800

Could you please explain how they calculated own cost of RS?

Vipin
Participant

if the company chooses from company b, then we have to calculate the relevant cost of RS. it is because they are in the group.
company B will have to purchase parts from RS for a price of 13,000.
at the same time , to make that component RS has to purchase another part from another company for a price of \$7500. when i did this for first time, my head was swinging.
cost of RS=their own cost +7500(price of part bought from outside).
but in the question, they also gave another statement which is a clue for calculation.

this is in additional data condition 2

2- RS costs for the RP contract, including purchases from RR and RT , total \$42,000. For the company B contract it expects a profit of 25% on the cost of its own work

consider the statement below,

For the company B contract it expects a profit of 25% on the cost of its own work

that is the clue for calculation.
they are taking profit margin only on cost of its own. NOTE, not on entire cost.

so they take,
own cost *125%+7500=13000(selling price to company
own cost*125%=5500
own cost=5,500/125%=4400

acca13
Participant

Could you pls tell me the other part too if you’ve some spare time, Relevant cost of RT?

May you Pass your papers in first attempt Amin

Vipin
Participant

total cost for RT 25000(30000/120%)
own cost of RT 14000(25000-11000)
variable cost of RT 9100(65% of 14000)

(2)

it is given
3- RT prices provide for a 20% profit margin on total costs
so we do the step
total cost for RT 25000(30000/120%)

also given
RT: 65% of own cost (excluding purchases from other group companies).
so we do the step,
variable cost of RT 9100(65% of 14000)

Vipin
Participant

sir,
i didnt understand the step below,

opportunity cost of external sales forgone by RR
8000+11000=19000

thanks

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