Dear Khun Chontira,
It seems that specifications are different for the main materials and we are yet unsure of this material availability. We are reviewing the market availabilities as can be supplied and, therefore, any price impact will only be known at a later stage.
More time is necessary for us to achieve a full review and we may not be able to send a revised offer (or propose a % reduction) today.
We should revert to you by Wednesday next week due to the coming holidays.
Should you be in a hurry to send your own offer to your customer, we can only suggest you to use our latest offer as a budgetary basis.
Thank you for your understanding.
In the hope to retie our relationship, we remain.