A Report to show the parent quantity on a sub Item.

I am currently working with the following take-off using parents to build up multiple Roof flashings in one location.

The Reports are showing the following layout. I want the 0.55 0.442m Girth Apron Flashing to show the parent length of 24.36m. Does anyone know if this is doable

I am trying to get a report to match as closely as possible to my client's current Excel systems, but having some difficulties. They do so manually, calculation, formula etc to calculate labour rates, wastage and margins etc