2+2, I tried to figure out what you meant but couldn't figure out how to make it work. For your interest, I did find a DateDiff calculation here that ignores weekdays...
((DateDiff("d", dte1, dte2) - ((DateDiff("ww", dte1, dte2, 7) + DateDiff("ww", dte1, dte2, 1)))))
Microsoft published a...