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About the Travel Expenses Model.

The Travel Model is a simple model, that can calculate the expenses of traveling by car..

The model is based on an easy set of equations:

Dist=Speed*Time,

GasTot=Dist*GasPU,

GasCost=GasTot*GasPrice,

where:

Dist - The distance of the travel (in kilometer or in miles)

Speed - The average speed of the car (km/h of ml/h)

Time - The number of hours spent on traveling

GasPU - The amount of gasoline used by the car per unit of distance (liter or gallon)

GasTot - The total amount of gasoline used for the travel (liter or gallon)

GasPrice - The price of gasoline per unit (liter or gallon)

GasCost - The total cost of gasoline used for the travel

which is transformed manually to:

Speed*Time+(-1)*Dist,

Dist*GasPU+(-1)*GasTot,

GasTot*GasPrice+(-1)*GasCost

The user communicates with the Solver by means of an Input / Output form as shown below:

Distance

Travel Time

Travel Speed

Gasoline / Dist. Unit

Amount of Gasoline

Price of Gas / Vol. Unit

Total Cost of Gasoline

 

When using the travel model you should input data to the right side fields and then press the "Resolve" button.

You can input any data, which is known at the moment.

All values that can be resolved, will be resolved.

At the next step of the communication the data calculated at the previous step will be used as input data.

You can give a field the value Void by emptying it. Click on it with the mouse and delete the value.

The results of the calculations are colored in order for you to see if your input data is invalid or conflicting.

The values calculated by the Solver are also colored.

The set of colors used for marking the results of the calculations is shown in the table below:

Void or preset the value of the parameter  
The value calculated by the Solver  
The conflicting result data values  
The conflicting source data values  
Invalid source data (not number)  

The message window displays messages from the Web Solver.

In the field placed at the bottom of the page you can see the equations used in the model.

Try it! It is easy to use!