According to the standard of Zhengshang Institute, the handling fee of Apple Futures (AP) is 5 yuan per lot, that is, 5 yuan is charged for opening and closing positions, but 20 yuan is more expensive for closing positions, that is, the cost of closing positions on the same day is 5+20=25 yuan/lot, and closing positions on the same day is 5+5= 10 yuan/lot.