merger of Group Companies

Dear all,

I am preparing a note which is to be presented to the Board of Directors of a  Company which is planning to merge all its group entitites into one.

if any body have any inputs on advantages of merging group companies ,such as 295 , 297 of companies act , pls share with me.

Pls also provide the cost involved in the process of merger.

Regards

Prashant Jain.