The total trade cost of resource commodities contains production cost ( especially labor cost ), environmental cost, intergenerational cost, mining tax cost, transaction cost and management cost. 资源性商品贸易全成本包括生产成本(尤其是劳动力成本)、环境成本、代际成本、矿业税费成本以及交易费用、管理费用等其它成本。
Secondly, considering the logistic volume fluctuate along with the time axis, a mathematic model is setup to reflect the total resource demands of the network for the purpose of minimizing unitary cost. 考虑物流量在时间轴上的变化特点,对其网络总的资源需求建立数学模型,以整体成本最小化为目标。
Farmland for each farmer is large and the agricultural population is few, only makes up 2.2 % of the total population, agricultural labor force resource is relatively lack, the opportunity cost is high. 美国属于农业自然资源相对丰富、经济相对发达的国家。农业人口人均耕地面积大,农业人口少,只占总人口的2.2%左右,农业劳动力资源相对短缺,机会成本高。
Make full use of the total resources of the enterprises, including human resource, material resources, and advance the cost control strength of the enterprises; 充分利用企业全面资源,包括人力资源、物质资源,提高企业成本控制力度;