To collect the file names from the command line, replace
print "Enter file name:\n";
chomp(my $file = <STDIN>);
open(DATA,$file);
with
chomp(my $infile = shift);
open(DATA,$infile) or die "Could not open $infile\n";
Add
chomp (my $outfile = shift);
open OUTPUT, '>', $outfile or die "Could not open $outfile\n";
before the final for loop. Replace
printf "%-4s: %20s, %-8s %6s\n",
with
printf OUTPUT "%-4s: %20s, %-8s %6s\n",
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