Hi Esther,
1) Get inside each Subreport and suppress every section
2) Go back to the Main Report > Right-click each Subreport > Format Subreport > Subreport tab > Check 'Suppress Blank Subreport'
3) Right-click the blue area beside each Details Section > Section Expert > Check 'Suppress Blank Section'.
This should essentially hide and yet show the values from the Subreports on Details g.
-Abhilash