summary of cost of returned goods

例句：

1. 1.The report should be summarized in a few sentences.
   这份报告应该用几句话总结。
2. 2.The teacher asked us to summarize the main points of the lesson.
   老师让我们总结一下课上的主要点。
3. 3. The summary of the meeting was that we needed to improve our communication skills.
   会议的总结是我们需要提高我们的沟通技巧。