Hi,
for inventory we have only one standard info cube 0IC_C03.
to know standard bex query's, use business content installation and grouping options as data flow after words.
drag you info cube from left panel to right side panel at business content screen.Due to the grouping option as data flow we will get reports also if exist.
Check table - RSRREPDIR, use query technical id/name - 0IC_C03_Q*
Bex query names always starts with cube technical name.
Thanks