If you give 3%, if you give 2 1 13, there will be no 3% increase.

Because the futures price is at least 1 yuan.

Just press 3%, that is 63.39.

You bought the hand, that's 63.39* 10.

It is 633.9

(Because, the first hand is 10 ton, and 2 1 13 is the price per ton.

Not counting your handling fee.

If the handling fee is 4 yuan, the unilateral profit is 629.9 yuan.