Hello Amit,
Lets understand that batch valuation is a standard SAP solution, wherein price control in the header material shall be kept as 'V'. This is necessary and you have to activate batch valuation for your material.
if you are working with Variant Configuration then you cab run your sales order costing via transaction VA02 by selecting the relevant line itmems.
If you are working without VC then you can use CK11N or CK40N, remeber your have to quote material and batch which you would like to cost.
As the costing will happen at batch level, that is the reason why it would have price control V which would evantually an average of all batches in that material.
IF you have any further queries, do get back.
Thanks,
Satish