You’ll see that the total cost is composed of three components–material cost, connection cost, and product cost. The Bridge Designer will display a table showing exactly how the current cost of the truss has been calculated. Now click the Report Cost Calculations button, located on the Status toolbar.
Run the Bridge Designer and load any of the sample bridge designs.
To understand the answer to this question, you need to understand how the Bridge Designer calculates the cost of your truss.