How to add new Settlement rule for Production Order

Dear Friends,

In our company have Production Orders for Hens (Asume 1000 hens per one Order)

In that order have Eggs (990 eggs) , when we going to close order the Cost will be settle to Eggs.

this is the current situation

as a special schenario we need to settle total cost to Hens.

I need to do this part with your help.

So please give me the steps with the Tcodes.

Thanks &

Kind Regards

Nelson Rodrigo