Please let me divide this issue in two ways.
Firstly, the price your company offers to Gintech Thailand in THB will be as fixed as they request. Therefore, please use the average exchange rate of previous 6 months exchanging from USD ( the original amount that JHS & TSG have come to the same page already) to THB and give us a new quotation so that we could reply back to Shin-Hsin soon today.
Note. Please be informed that the currency & the unit you're asked to indicate in the quotation will be THB & KG respectively.
Secondly, the payment which your company will make to us is still in USD.
But by the time when your company is about to make the payment, the exchange rate fluctuates drastically, however. We could re-discuss the price and the adjustment will be made then.
Please let me know if there are other things which we need to settle or clarify.
Thank you.