Generally, oil mills don't charge processing fees, but the residue after peanut oil pressing belongs to the oil mills (peanut residue can be used as fertilizer or feed raw materials). At present, 1 kg peanut oil can be extracted from about 2.5 kg peanut, and the cost per kg peanut oil is about 13.25 yuan. If it can be sold to 15-20 yuan/kg, it will be profitable.