business process

hi,

We have a process in our industry, kindly help me to map it in SAP.

There are twp plants plant A and Plant B which belongs to same company code.

Plant A manufactures a product X. Then the material X is sent to plant B for painting. Once plant B finishes with painting material X it is sent back to plant A. how to map this is in SAP.How plant B tracks how much material they have painted and how the profitability is calculated for Plant B.