Taxfree outward supply

plz experts advice me. if a composition dealer make an exempted or nol rated and taxable outward supply then in such case my quest. as under ; 1. whether gst @ 1% should be payable on total supply (i.e., on both taxable and taxfree items) 2. whether tax should be pay on or before 18.10.2017 or we can pay upto 15.11.2017 (extended date) without paying late fee. plz experts advice me regarding above query.