<https://forum.ozgrid.com/forum/index.php?thread/1228727-get-error-debug-because-average-s-worksheet-function/>
<http://schema.org/dateModified>
<https://forum.ozgrid.com/forum/index.php?thread/1228727-get-error-debug-because-average-s-worksheet-function/&postID=1242466>