Yes, you can sum values from instances, such as the total area or total price of a specific type. An example: on one of your door types in the Object table you can view the total price of all instances (of that type) in the project.

• Add Property.
• Select Function.
• Select Type; Function properties are only applicable for Types.
• Select Sum as Function Type.
• In the field Available Data, select a source property from the drop-down menu.
• Give the property a name and Add.
• Go to Manage and add the property/column to the object table. You can now view the total sum of the instance property that you selected.

Where: HOME / <project name> / OBJECTS / Configuration