Dear Sir
I am writing this letter to thank you for the help you provide in recent days.
I am sure more concern is certain to help increase our future cooperation.With sales up,the cost of raw materials has moved up greatly,unfortunately,the labor cost grows too.As for this situation,we have some suggestions,we have to readjust the prices.The prie list should be changed.The upward period has passed,the general trend is downward.Due to the weak market,we considerably hope to increase our cooperation.Welcome to order our prodac.
your sincerly,
XXX