The price is huge increased pls check for me whether it is correct or not (1,200 - 2,400 - 9,000 bht/cylinder) as I am giving my empty cylinder & refilling by you it is more costly for me, is there any reason pls advise.
Just for comparison last year I purchased with PO No. 05/07/2015 (as per attachment) with your cylinder. I think it is more cheaper than now.
Thank you and best regards,