I looked in the HELP file and found this:
Creating new criteria for quantity takeoff criteria:
1. In Toolspace, on the Settings Tree, expand the Quantity Takeoff collection. Right-click the Quantity Takeoff Criteria collection. Click New.
2. In the Quantity Takeoff Criteria dialog box, click the Information tab.
3. To edit the name of the criterion, enter a new name in the Name field.
4. To edit the description of the criterion, enter a new description in the Description field.
5. Click Apply to make the changes, or click OK to make the changes and close the Quantity Takeoff Criteria dialog box.
6. To define or edit the criterion, click the Material List tab.
7. Click Add New Material.
8. Select the new material. Click the Quantity Type field. Select the quantity type, either Cut, Fill, Cut and Refill, Earthworks, or Structures.
9. Click the Shape Style field. Select the default style used to display the material section in a section view. For more information about using Shape Styles to review material calculations graphically, see Reviewing Sectional Volume Results Graphically.
10. Optionally, edit the cut, fill, and refill factors by selecting the corresponding fields. Enter new values.
11. If you selected a quantity type of Cut, Fill, Cut and Refill, or Earthworks to add surfaces, select the new material. From the Data Type list, select
Surface. In the Select Surface list, enter the surface name or select a surface.
12. If you selected a quantity type of Structures, to add corridor shapes, select the new material. Select Corridor Shapes from the Data Type list. In the
Select Shape list, enter the shape name or select a shape. Click the Shape Style field. Select a style for the shapes.
13. For each data type added to a material, click the Condition field. Select the condition.
14. Optionally, repeat Steps 7 through 13 to create all required materials and surfaces.
15. Optionally, add subcriteria. For more information, see Adding subcriteria to the material list of a sample line group.
Click Apply.
Cut, Fill, and Refill Factors
Use Cut, Fill, and Refill factors to adjust volumes to be hauled. As the hauled volumes are used as a baseline set at an even factor of 1.0. The adjustment factors are:
Cut factor - As the volume of material generally expands after it is removed, the cut factor is usually set to greater than 1.0, indicating swell or expansion. For example, a 1.2 cut factor would mean that for every 1.0 cubic meter of material removed, 1.2 cubic meters of volume would need to be accounted for transport.
Fill factor - As the material generally compacts when used as fill, the fill factor is usually set to greater than 1.0, to indicate compaction or shrinkage of the material when it is used as fill. For example, a 1.2 fill factor would mean that for every 1.0 cubic meter of material required for the fill site, 1.2 cubic meters of that material would need to be transported.
Note
For example, for a material that compacts to 93% of its original value when used as fill, enter 1.075 (which is derived by dividing 1.0 by .93) as the fill factor to compensate for the extra material that must be added.
Refill factor - As this factor depends on the cut material type and other considerations, it can run across a range. A heavy aggregate might have a Refill factor of 1.0, while fill cut from a rock ledge might have a Refill factor of 1.2. Not all cut material may even be reusable, as when it is cut from bog or marsh. The refill factor would then be 0.
this was much easier in LDD...
best of luck with civil 3d.
nonbeard
