Sum, index, match two columns and put into ascending order

I've already been blessed from the forum with the formula to lookup this table, and put my entries in ascending order. My issue now is, when my panel lengths are the same, I want to sum the quantity needed, and put them into my work order/cut list as one entry, not 2 of the same length.

Below the tables is what it should look like with the right formula, if possible.