You short corn on 2011114, and the price is 2365 yuan per ton. After shorting, the price of corn rose to 2466 yuan per meal, so the loss was (2365-2466 )×10 =-10/0 yuan, plus the first-hand handling fee -4 yuan, so the loss was10+.

By the way: the mark-to-market profit and loss is not your actual profit and loss, but the comparison between the real-time price and the settlement price of the previous trading day. Your actual profit and loss is the comparison between the real-time price and the opening price, MINUS the handling fee.