It has been about 40 days from our first quotation,you know,the exchange rate is changing these period, and our price maybe have some adjust, we hope you could give us your order forecast ASAP so that we could prepair in advance, and ensure prompt delivery .

或者

During this period,the exchange rate between RMB and USD keep changing ,and much than the rate between EUR and USD.Additionally,the price rise in domestic is so much that price of raw material is higher.

这两个是根据不同情况回复的.

你可以根据实际情况改改，说说出口方的难处.客人也是人，他着急要货的话，肯定会体谅的.

祝你接单顺利.