sub convert_to_csv {
    my $input_file = $_[0];
    my ( $filename, $extension ) = split( '\.', $input_file );
    open( format_file, ">:**encoding(utf-8)**", "$filename.csv" ) or die "could not open out file $!\n";
    my $excel = Spreadsheet::XLSX->new($input_file);
    my $line;
    foreach my $sheet ( @{ $excel->{Worksheet} } ) {

        #printf( "Sheet: %s\n", $sheet->{Name} );
        $sheet->{MaxRow} ||= $sheet->{MinRow};
        foreach my $row ( $sheet->{MinRow} .. $sheet->{MaxRow} ) {
            $sheet->{MaxCol} ||= $sheet->{MinCol};
            foreach my $col ( $sheet->{MinCol} .. $sheet->{MaxCol} ) {
                my $cell = $sheet->{Cells}[$row][$col];
                if ($cell) {
                    my $trimcell;
                    $trimcell = $cell->value();
                    print STDERR "cell: $trimcell\n"; ## Just for the tests so I don't have to open the file to see if it's ok
                    $trimcell =~ s/^\s+|\s+$//g;  ## Just to make sure I don't have extra spaces
                    $line .= "\"" . $trimcell  . "\",";
                }
            }
            chomp($line);
            if ($line =~ /Grand Total/){} ##customized for the files
            else {
            print format_file "$line\n";
            $line = '';
        }
        }
    }
    close format_file;
}