I am afraid that you might be misunderstanding.
I means that IIT have to make a break down quotaion of THB164,000- With the rate 4.0 rate. My point is I'm afraid that the customer must ask for rate around 4.0 after submiting break down quotaion, since the cuurennt THB3.1 But If customer complain this rate(price) to us Please explain to customer by IIT.
I will let you manage this issue on IIT policy.