GTA RCM rcm itc claim or not

My friend is a dealer in animal feeds which is NIL rated supply. He will buy from a manufacturer (inter-state) and goods transport to  his godown by registered gta . The transport charges will be around Rs.1,35,000 to Rs.1,40,000 per trip. So he needs to pay GST under RCM? If yes, whether he can claim ITC and get a refund on ITC later? 

and also upply of fish medicine which came in gst taxable.