How can i use variable from diffrent foreach to get value by adding 2 variable itself

Hello guys, now i have little problem that spend my time not to hard but don't know how to solved this, here is my view

Code:

<?php
foreach ($sum->result() as $row) {  ?>

$untung=$row->jumlah_item;    

<?php  }  ?>



<?php
foreach ($sumongkir->result() as $row) {  ?>

$ongkir=($row->total);

<?php  }  ?>


$total=$untung+$ongkir; //it doesn't working, what do i wrong here? please guide me to debug it, thanks