This is Mark, Kiki's general manager from XXX公司.(表明身份,总经理出马,表示重视)
I must apologize for our fault.(废话别说,有错就得道歉)
When kiki sent you last offer,we made a serious mistake.The price for ** should be 1050usd,not 950usd.
At that moment,I was on businees trip outside when kiki telephoned me to get the offer for ***.I should have checked the offer again before sending to you.
Sorry to make you some many troubles.
To show our sincerity,I would like to give you our bottom price:1010usd/mt.