Because the position is closed on the opening day, the profit and loss of closing position is (2330-2310) *10 *10 = 2000 yuan.

The position profit and loss is the position profit and loss after the closing settlement, so it is calculated as (2322-2310) *10 =1200 yuan according to the settlement price of the day.

Similarly, the trading margin of the day, the remaining 10 lots are calculated according to the settlement price, which is 2322 *10 */kloc-0 * 6% =13932 yuan.