Attached please find PO with additional note on acceptance of addition diff 400 THB in the PO as it was your mistaken information when gave us quote price before issuing PO. We cannot revise PO in the system and we can accept diff 400 THB as it is +/- less than 10% in the PO. Please careful next time when you provide us quotation and ensure you have included BCD service fee as your error created us a lot of duplicated work and waste of time. Thank you.