in admin/includes/boxes, replace the reports.php file or add this code to your reports.php
in line where reads 'link' => tep_href_link(FILENAME_STATS_CUSTOMERS)
)
immediately AFTER the second parentheses paste this:

,
array(
'code' => FILENAME_STATS_PRODUCTS_UNSOLD,
'title' => BOX_REPORTS_PRODUCTS_UNSOLD,
'link' => tep_href_link(FILENAME_STATS_PRODUCTS_UNSOLD)
)

Save the file


More...