On a certain trading day, there are 2800 open contracts in a futures contract. On the second trading day, we got the following information: 2700 transactions were made throughout the day, including 200 bilateral positions and 2500 open positions. Q: What is the number of new positions and positions?

Release: When the old warehouse 2800 newly opened 200 lots and changed hands 2500 lots, the total number of newly opened lots was 2700 lots and the positions were closed 2500 lots, which added up to 5200 lots.