Length of driving line to cells associated --> REPORT

.DGN attached

How to set REPORT to display TOTAL LENGTH of line to EVERY ASSOCIATED CELL with multiple ITEM TYPES within?

As file shows - I would like to attach multiple parametric cells /ITEM TYPES/ to line string and gather line string length of specific /driving/ line to each of parametric cells sits on it.

Report works well for parametric cells as themselves - ONLY THING MISSING IS LENGTH OF LINE STRING FOR FIRST TWO ROWS.

Can anyone cen help to set hierarchy of report to get that value? After hours of trying I felt into confusion. . .

Cheers and regards!