Pratik,
yes as Althea said only one rule will suffice. As again we have been discussed there will be no impact in material master.
Standard price are used for products that do not fluctuated frequently. It is usually used for finished or semi finished products. so the price will be constant.
Moving average price are used mainly for raw materials that are purchased externally. The advantage of using moving average price for your raw materials is that your inventory costs will always reflect the current market cost based on valuation relevant movement.
Say in a material master you have
Standard price as -100
Moving price as-110
No Impact-CK11n
if you do ckk1n using the costing variant which takes Moving average price 110 will be costed Provided your material master price control is M and costing variant with standard price will be costed as 100 if the material price control is S.
So the impact in material master uptill now is nothing. anything you do in ck11n is technically does not impact anything in material master.
Impact--CK24
The next thing when you try to mark & release the cost using CK24 ( Impact will be in material master ) the cost will be updated.Based on variant you select first to update the cost.
Note-
1-Here the cost estimate of a material can not be released twice in a period with different costing variant
2-Material master Price control determines which price to pick either S or M during costing run.
I hope it clears your doubt. try to understand the requirement client prospective and i am still not getting what is the end purpose.
Thanks
Hrusikesh