It is argued that the sustaining costs are basis of life cycle cost of AM,as its life cycle is shorter conceptually.

So we propose a cooperative inventory control model and algorithm of equipment s spare parts based on supply cost.

Supply time can substitute supply costs under some conditions.

Based on this, the unit power supply cost including the environmental costs of different thermal power plants was calculated, and the impacts of sulfur and nitrogen content variation on unit power supply cost was di.

Linkage price for the high dissipative energy user is proposed as the result of study on electricity price, which is base on power supply cost of power corporation.

Mathematical models for water supply cost of hydraulic engineering;

In order to find out the actual cost of water supply enterprises and promote the formation of reasonable water price mechanism, investigation and examination were made on water supply cost in a city under administration of province.

The water supply cost and water fee standard of the surface and groundwater conjunctive use for irrigation areas have been analysed and discussed by using the actual data of projects.

Investigation and analysis of the cost of water supply at the final canal system in the gravity irrigation area of the Yellow River in Ningxia;

By analysis of the cost of water supply in the irrigated regions, the influences of different electricity prices on the cost of water supply in those regions and the current water price policy are studied.

This paper conducts an analysis and discussion of the cost of water supply and standard of water expense for combined well with canal irrigated area by using the pratical data in engineering.

The heating cost is refers to the heating enterprise to occur in a heating time by currency performance each kind of material, the labor, the expense consumption.