~ $ usage=$(gconftool -g /cellui/settings/datacounter/general/gprs_home_notification_period_UI) ; tx=$(gconftool -g /cellui/settings/datacounter/transfer/gprs_home_tx_bytes) ; rx=$(gconftool -g /cellui/settings/datacounter/transfer/gprs_home_rx_bytes) ; total=$(($tx+$rx)) ; `dc $total $usage / p`