Dear Friend,
What I understand from your query is that you want to get some exemption/concessions from charges. Generally, there is are no customs duties to be paid on exports unless specified in certain commodities like Ores, Cement etc.,
Coming to charges an exporter generally from the point of clearance to port of export incurs , Freight,Insurance, in addition to the charges to be paid to the CHA who handles the export clearance.
In view of this, I suggest you to please approach a CHA who regulaly deals with export transactions in the port of export from where you propose to export your commodity
Best Regards
Suryanarayana