The handling fee of PTA is 0.02%, and the handling fee of crude oil is 0.05%, which is the handling fee charged by the exchange, plus the handling fee charged by the authorized service agency where you open an account (tentatively the lowest handling fee, which is 100% of the exchange), so PTA is 0.04%, while crude oil is 0. 1%. Now suppose the price of crude oil is 5000 yuan/hand.

Crude oil, 5000×20%= 1000 yuan, as a deposit; 5000×0. 1%=5 yuan, which is the handling fee; Therefore, the turnover of crude oil per lot is 1005 yuan. If there is no extra handling fee for closing the position on the same day, the current price multiplied by 0. 1% will be charged the next day.

PTA, 8000×20%= 1600 yuan, as security deposit; 8000×0.04%=3.2 yuan, which is the handling fee; Therefore, the transaction amount of PTA per lot is 1603.2 yuan. If there is no extra handling fee for closing the position on the same day, the current price multiplied by 0. 1% will be charged the next day.