Subject: Apology for Wrong Price Quote 错误报价
Dear Ms. Yeung,
I am sorry there was a mistake on our last transactions. The quotation （报价）I gave was not for the products you had requested. I apologize for this mistake （我深表歉意）.
I will send the right quotation （正确的报价） via your Email address before the end of the day. I promise this will not happen again in our future business engagement （业务合作）. Kindly consider my apologies.
Thank you so much.