So this formula works for me. I am trying to add another criteria though and cant figure it out.
=SUMIFS([Number of Slides]:[Number of Slides], Done:Done, 0, Status:Status, "Stained")
And it works but i want it to add the "stained" and "staining in progress" in the same column. how to i rewrite the formula in order for it to do this? "Staining in progress" is also listed as an option in the same status column.