韩国采购需求：防腐剂、乙二胺四乙酸、山梨酸、乳酸钠、维生素C、维生素B1

We're looking to import a specific seed powder with high dietary fiber content and stringent heavy metal limits. For a potential order of 7 MT, could you provide pricing per kilogram and confirm the CIF shipping options to Incheon, both by air and sea? Additionally, please share your production lead time from the purchase order to shipment, along with relevant documentation like the COA, composition details, and a manufacturing flowchart, as we're exploring long-term partnerships. Your prompt response would be appreciated!