By the way, TIN volume is not measured in ounces (oz)!

A TIN volume surface is a composite of points in a base surface and comparison surface.
A TIN volume surface provides an exact difference between the base and comparison surfaces. Therefore, the Z value of any point in the volume surface is precisely the difference between the Z of the comparison surface at that point and the base surface at that point. This is true whether the comparison and base surfaces are both grid or both TIN, or one of each.
A volume surface is a persistent surface object. Therefore, you can display cut and fill contours, cut and fill points, and add labels to it. A volume (cut, fill, net) of a volume surface is a property that can be viewed by selecting Surface Properties.
If you want only to query and obtain information about a surface volume or bounded volume, you can use the Volumes and Bounded Volumes utilities. For more information, see Calculating Surface Volumes.

To create a TIN volume surface:
Click Surfaces menu --> Create Surface.
In the Create Surface, in the Type list, select TIN Volume Surface.
Note: If you do not select a layer, the surface is placed on the current layer.
In the properties grid, name your surface.
Note: To name the surface, click its default name and enter a new name, or use the name template.
Chose a Style for your surface.
To change the render material for the surface, click the Render Material property in the properties grid and click in the Value column.
Click the Base Surface property to select the base (bottom) surface. Enter the surface name or click to open the Select Base Surface dialog box where you can select the surface in the list.
Note: Select a surface in the drawing by clicking and following the instructions at the command line.
Click the Comparison Surface property to select the comparison (top) surface. Enter the surface name or click to open the Select Comparison Surface dialog box where you can select the surface in the list.
Note: Select a surface in the drawing by clicking and following the instructions at the command line.
Click OK to create the surface.
The surface name is displayed under the Surfaces collection in the Prospector tree.

Click --> Surface properties --> Statistics.

= CUT, FILL, NET!!!