How can I get a number from a child item and a parent item?

Parent/Child like this?
What numbers are you trying to get and where are you trying to put them???
On a report?
On the qty for spur brackets I need to multiply the qty from shelves and uprights so in this case the result would be 2


@kevin, Where you go? Does the above work for you???
Worked perfectly Thank You!!
Is it possible to do this to reference an item property in the takeoff name? I tried [./Custom Property Name] but it didn't work.
try [../Property Name] ,but if it is the same property name you can also use [Property Name]
Let me know if that helps