人工翻译,请鉴定!
Excuse me,I was so busy these days that I had no time to go online until my computer was connected with the Internet today.Upon seeing your letter,I delivered your goods.However,there was only one red piece left which you had ordered three,so I replaced with a black one.I'm so sorry!
In addition,I made a mistake when I counted the total price of your goods and the carriage charges so that I lost money.But because you are my regular customer and we are also friends,I still delivered your goods.
At last ,I hope you'll be happy everyday.