Production operation wise profitiblity

Hi,

I  need solution on the following scenario,

suppose there are three operations(10,20,30) in a production order.Client want  to do profitability  of each operation.There is Deseret Manufacturing

and every operation have different work center.Actually,client  want to know the costing of each operation of the manufacturing.

Please suggest me ,how can the operation wise profitability be find in sap.