$dao->mailing_id_b => (2 * $totalSelected <= $totalCount) ? $totalSelected : $totalCount - $totalSelected,
$dao->mailing_id_c => max(0, $totalCount - $totalSelected - $totalSelected),
$dao->mailing_id_b => (2 * $totalSelected <= $totalCount) ? $totalSelected : $totalCount - $totalSelected,
$dao->mailing_id_c => max(0, $totalCount - $totalSelected - $totalSelected),