Question

有关期货合约的计算题

On a particular day, there were 2,800 open interest in a particular futures contract . In the next day , we have the following information: total 2,700 trades, 200 contracts between new buyers and new sellers and thus 2,500 open interest in the day. Then what is the number of contracts between new positions and closing out positions?
跪求大神，翻译翻译，讲解讲解，并且做出答案。先谢谢啦！！！
答案正确一定双倍悬赏给分。。。
拜托了。

Answer 1

某交易日，在某一期货合约上有2800手未平仓合约。下一交易日，我们得到以下信息：全天共交易了2700笔，其中双边开仓200手，未平仓合约2500手。问：新建立的头寸和平仓头寸的数量是多少？
解：老仓 2800 新开200 换手2500 那么总的新建头寸是 2700手，平仓2500手，加起来就是5200手。

Answer 2

百度翻译一下

追问

一楼翻译的就差不多啊。主要是做出来，答案是啥...