Is it possible to do a physical inventory count (Inventory -> Operation -> Inventory Adjustments) by counting cases, packs, and units individually?

For example: 

The WH/Stock location has:

x cases of 24 units each

y packs of 6 units each 

and z units

Multiple lines using the same product but a different UoM doesn't seem to work? Do I have to do a manual calculation 24x + 6y + z before capturing it? or is there a module that can allow this?