Choose and establish in space of your virtual model object or group of objects for which it is necessary to execute calculation.
You can simultaneously specify the fragments executed by various elements.
For convenience use regular means ArchiCAD for a choice of objects: Shift+Leftkey of the mouse and Ctrl+Rightkey of the mouse.

For performance of calculation press the button with the calculator image.
Thus in a floor of the list of variables the information on type and quantity of elements and values of the sums of properties which are available for all types of these elements will be reflected.
For example, if the wall and flat range by virtue of that the range does not possess property "Volume", value of this variable is not summarized is chosen and does not show in the list.
And at a choice of a wall and a 3d-grid, for example, their volumes develop.

Do calculations in ARCHICAD