AISC:　all-in sustaining cash costs commences with total cash costs and then adds sustaining capital expenditures, corporate general and administrative costs, mine site exploration and evaluation costs and environmental rehabilitation costs

两位都是2000的时候买来投资的，现在损失25%。如果投入资本的10%，现损失10%*25%=2.5%，为何如此忧心？