The formula I'm using currently returns the cell as blank if children are "completed" or "nothing to submit", but I would like it to return "Completed" in that case.
=IF(COUNTIF(CHILDREN(), "Complete") + COUNTIF(CHILDREN(), "Nothing to Submit") = COUNT(CHILDREN()), "Complete", IF(COUNTIF(CHILDREN(), "Not Started") = COUNT(CHILDREN()), "Not Started", IF(COUNTIF(CHILDREN(), "In Progress") > 0, "In Progress", IF(COUNTIF(CHILDREN(), "Not Started") > 0, "In Progress", IF(COUNTIF(CHILDREN(), "Blocked") > 0, "In Progress")))))