Vat invoice amount

1. What amount to be mentioned in the invoice  as the value of the item, if transferred to 1) other branch in same state , 2) other branch in different state. (It is against F Form if transferred to branch in different state)

2. Should the value of the item transferred be nil or cost value in the invoice? 

3. CST (inter state branch transfer) / VAT (transfer within state) would be mentioned as nil? ( being inter-branch transfer )

Thanks in advance