A PERSON ENGAGED IN SUPPLY OF BUILDING MATERIAL LIKE RETI, KHADI, SAND, Etc THROUGH HIS OWN TRANSPORT VEHICLE. SUPPLY OF BUILDING FETCH UNDER 5% GST, ALSO TRANSPORT OF GOODS FETCH 12% GST, ALSO SUPPLY OF BUILDING MATERIAL IS PRINCIPLE SUPPLY, HENCE CAN SUCH A SUPPLIER COLLECTS 5% GST ONLY, ON SALES BY CONSIDERING THIS AS COMPOSITE SUPPLY, IGNORING 12% GST ON TRANSPORT OF GOODS.