What do these numbers and symbols mean in my Documents folder in Finder?

My Documents are uploaded automatically to iCloud, I recently put a bunch of photos into a subdirectory under ~/Documents/Old Photos and noticed Finder is syncing that directory to iCloud. However the numbers are a little confusing.

See in the middle of the window there's an up-arrow with 159.28 GB next to it. What exactly is this? I thought it was the amount of data left to upload, however it is going up and down rather than just down. Maybe MacOS is just doing a bad job calculating the remaining data...

Any insight would be helpful

I think I've figured it out. So when I click the pie shown by the arrow below

this pops up another window showing the progress of my uploads

So I guess the figures do represent the data remaining for that directory, maybe MacOS just made up the numbers at the beginning

¯\_(ツ)_/¯