A person is doing business of arranging trucks from market and supplying to a GTA. GTA is using these vehicles in transporting of goods from a company. GTA is issuing consignment note (bilty) to the company & charging GST from company. GTA is transferring the amount received from company to the person supplying trucks (after deducting his commission) & the person is making payment to the truck owners. What will be the GST liability in this case?