Caustic soda inquiry from China for Turkmenistan

We are in need of 1500 tons of Caustic soda, and would kindly request you to provide your most favorable quotation as per specifications.
our end user is in Turkmanistan
So,please also provide:
Delivery Terms: Exwork and/or FOB and\or DAP Ashgabat.
Delivery Time: Please specify.
Payment Terms: Please specify.