Economic – Administrative

Operation Costs
In the case of an operation that is taking place, the costs are taken directly from the information of incurred or historic costs.

The costs should be presented, classified and differentiated by the cost center and nature of costs. The costs, fixed costs and variables all need to be differentiated inside this classification in order to be able to project them in the case of dimensioning the scale to different levels of production.

In a dimensioning of a new project and for a defined scale of production with all the information and studies done and considering all the parameters in the different stages of operation, the costs are calculated by center of costs and the nature of the costs.

Value of the Mineral
The mineral products are valued in the conditions of the existing merchandize in the case of mines in operation, for the case of new mining projects valued in base of the general market conditions, which are defined by known of and reputable merchandizing companies in the country.

Gross Useful Margin
The yield is determined by adding all the entries obtained during the phase of execution of the project and operation of it. Also consider other types of income that the company can generate. This yield should be very precise considering the production program, scale of the same, type and value of the mineral according to the zones of the exploitation.

The expenditures are defined by the costs of the operation of the project, which should be well defined and analyzed. The difference between the yield and expenditure constitute the gross useful margin.

Project Life Span 
For the ends of the project determine the life span of it in function of the proved and probable mineral reserves and the volume or scale of production that is established.