2018年bec初级商务英语写作：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,