The information in this article applies to:
How can I add a line item to a materials list in the appropriate category? For example, I would like to add the cost to use a cement mixer to the "Foundation" category.
Adding a line item to the Materials List in Chief Architect is easily done by specifying the item as a component of one of the architectural objects in your plan.
Keep in mind that the line item has been entered as a component in one object in the plan. In this case, the cement mixer is a component of a single wall of the foundation.
If you delete the foundation and rebuild it, or just delete the wall in question and rebuild it, the components associated with that wall will no longer be part of the Materials List.