Quick 'n' dirty solution: Put your Big Levers in a hash, then do keys on the hash to see what has been defined:

$BigLever{NETOVERGROSS_ORDS} = .98
[download]

...etc, in your module, then

foreach my $key (keys %BigLever) {
   print "$key defined with $BigLever{$key}\n";
}
[download]

(or whatever) in your code.