SUM between Cells as a fillable function

[MambaMentKC]

I am looking for a fillable function to SUM Colmun5 between the first "Break" row in Column6 & before the next "Break" row when column 8 is "00:00:00" and skipping the gray "[Date] Total" rows values?

All help is appreciated!

[#2]

Share the sample file here to the post.