商务英语写作范文:表明愿意为不良品质负责

Dear Sirs,

　　If you care to dispose of the inferior goods at the best price obtainable,we will sent a cheque for the difference when we hear from you.

　　We apologize sincerely for the trouble caused to you and will take all possible steps to avoid such a mistake again in the future.?　　

　　Yours,