客人抱怨质量问题 英文理解有点障碍

我出了一批货给客人，客人反馈质量有问题 I would say that probably 70% of all sides need work one way or the other. Much of it we can fix more or less with the belt sander or hand sanding. Out of these 70% maybe 20% he break-outs, of which we can repair the small ones, but we he to cut off the bigger ones 20%是指这70%里面的20%，还是指除了这70%外，还有20%我们需要重新？