back from holiday, I went to my office as usual. we had a meeting in the morning. nothing special happened last week. I was thinking about the meeting as I entering in the meeting room. the first thing my boss talked beyond my expectation. He is asking who listed the sales details for a costomer and forgot a zero of the account . No body answered. I knew it's me but I dare not say a single word  of it. I knew how stupid I was to make suach a foolish mistake.I forgot a zero of a hundred thousand and made it became a ten thousand. unlucky that my colleague didn't check and just sign her name on the list. days later, the manager find out this problem and save the lost of my mistake. oh, I even didn't know how I made this mistake at all. I am always careful in doing everything, this was the most serious mistake I'd made since I was working here. i felt guilty that my colleague was also  criticised by my boss for my mistake.sorry about this.