How to post FI document and change MAP using Movement Type 309 in MB1B

Hello,

I want to post FI document for Movement Type 309 in MB1B and also change MAP for that material by creating Z or if any standard enhancement.

Here raw material (code) and finish material (code) is same. We create z material type for that. We are having single material type for all the materials. We just transfer material from one storage location to another storage location using MB1B and movement Type 309. At that point I want to post FI document for value addition because we are not using PP module and also we want to  change MAP for that material.

Please update me if any standard enhancement is there or guide me how to create Z.