If the price of soybean meal short hands is 3452 yuan per ton, and each hand is 10 ton, at the margin rate of 10%, you should provide a margin of 3452 yuan when you open the position.

If the settlement price is also 3452 yuan, then you will pay 3452×10× 5% =1.726 yuan tomorrow at the rate of 5% increase.

If the settlement price tomorrow is 3452×( 1+5%)=3625 yuan, if you want to maintain the position, you need to add a margin: 3625-3452+1726 =1899 yuan.