print qq!>Postal mail invoice</TD></TR>!;
$invoicing_list = join(', ', grep { $_ ne 'POST' } @invoicing_list );
print qq!<TR><TD>Email invoice <INPUT TYPE="text" NAME="invoicing_list" VALUE="$invoicing_list"></TD></TR>!;
print qq!>Postal mail invoice</TD></TR>!;
$invoicing_list = join(', ', grep { $_ ne 'POST' } @invoicing_list );
print qq!<TR><TD>Email invoice <INPUT TYPE="text" NAME="invoicing_list" VALUE="$invoicing_list"></TD></TR>!;