Lets think u ve started a business and ve facory inn which u produce a product.
Mr A comes to you asks for something Called as estimated cost or Quoted cost.
u just cannot compute it..wat will u do.
ull call ur purchase manager for Material cost.
Production manager for labour cost..
overheads wat u gonna do...say u ve spent 1Lks for machinery...but u got to say,the estimmated product cost to ur customer per unit...Can u charge entire 1L to him ,no u cant!..
so estimate how many units u can produce in the year say 10000...
deprecaition cost of the machinery say lifee is 5 years..so 20000 per year...
thus ur estimated overhead cost per unit 20000/10000=2 p u.
From the details u quote the cost to MR A,say (Matl cost + labour Cost + oh cost) + prft esmtd=10
This is wat is called as "Standard cost",Further there may be varinace....in life u might estimated many thigns ,have they come perfectly allrite..No!..this gives birth to Standard costing & Variance Analyssis...i mean actuallyy when u produce the product & sell to mr A...it may not be perfectly as estimatedd..thus u analyse wat went wrong and there for variance analysis...there fore out of the report wat u generate ,u control cost..so that u don repeat the mistakes wat u have done....
The above was Costing ,Called as standard costing..
So Wat the heck is marginal costing....
This is a tool for decision making...
u count only variable cost...
Now wat does that mean...
take above Example of Mr A...
think Matl cost from purchase mgr= 3 p u
Labour cost production mgr = 2 p u
this is ur variable cost, isnt it? there for marginal cost....
ohs cost of 1 lacs simply forget...For time being...
i told u Marginal costing is for decision making...
ill elaborate how...
u knw ur varibale cost is 3+2=5 pu
then u ve spent for machinery 1L...
as decided in standard cost above ,u quoted a price of 10 p u to customer MR A.....
u simply wanna knw how many units u got to sell ,at which u lll break even...
So ur VC=5
SP=10
Forget abt the Fixed overhead cost which is 1laks as of now...
just think VC is ur exp i e 5 p.u...
so if sell one unit to MR A...the money which remains with u is 5...Every one unit ull make 5 Rs...
call it contribution as of now...
with this 5 rs which has remained with ,u got to recover something...
Now wats tat,obvously ur machinery cost=1Lakhs....
So many units u got to sell ,to recover ur 1 lakhs..which u ve invested,after which the entire 5 rs p.u. which u recieve is ur PROFIT....
Every unit u sell ull get 5 rs...so u got to sell 20000 rs...to recover ur 1 lk rs,after which mam...
u gonna enjoy pft...
lessons to be learnt...
u got to learn before u actually sold goods ,tat u got to sell 20000 units to break even...
now Doesnt tat ,help for decision making....it does,u cant deny it...
therefore proved tat Marginal costing is a tool of decision making...
And Am exhausted..
Enjoy....