Convert UFCU csv to my own csv for import to Excel

convert_ufcu_csv.pl

#!/usr/bin/perl -w

use strict;
my $self=$0;

# (1) quit unless we have the correct number of command-line args
my $num_args = $#ARGV + 1;
if ($num_args != 2) {
    print "\nUsage: $self <raw UFCU csv> <output>\n";
    exit;
}
 
# (2) we got two command line args, so assume they are the
# UCFU csv and desired output csv
my $infile=$ARGV[0];
my $outfile=$ARGV[1];

# (3) confirm command run
print "${self}: $infile $outfile\n";

# (4) open files
open (INFILE, $infile);
open (OUTFILE, ">$outfile") or die $!;

# (5) read infile
my @contents = <INFILE>;
@contents = reverse (@contents);

# (6) parse infile and write to outfile
foreach (@contents) {
    chomp;
    s/\"//g;
    s/\$//g;
    my $len=length();
    if ($len > 0 ) {
        my ($date, $desc, $amount,$bal) = split (/,/, $_);    
        if ($amount < 0) {
            print OUTFILE "$date,$desc,,$amount \n";
        } else {
            print OUTFILE "$date,$desc,$amount, \n";
        }
    }
}

# (7) close files
close (INFILE);
close (OUTFILE);

# (8) remove infile
my @args = ("rm", "-f", $infile);
system(@args) == 0 or die "system @args failed: $?";