I wouldn't use an anonymous sub for that first bit. Maybe it's one case where
map in a void context would work.
On the other hand, if this is something you might want to do later, there's no reason not to turn it into a function itself. Regardless, here's the damage that Dominus may cheer and merlyn will jeer:
$header{'Number of Drills'} =
(map { $total += $_->{count} foreach (values %{ $_->{tool} });
$total } @drill_arr)[-1];
Yuck. :)
Update: I spent too long getting this to work and forgot about do. Don't hate me because I wrote perverse code. Just live and learn.
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