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Foreach Adding up


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Hello can someone please help me im running a foreach loop that is pulling the prices value out off my database as follows.


this is the function

function one_life()

	$query = "SELECT * FROM paypal_payment_info order by paypal_payment_info.mc_gross DESC";

	$result = mysql_query($query);

	echo mysql_error();

	$result = db_result_to_array($result);

	return $result;

$one_lifes = one_life(); 


This is my foreach loop

<?php foreach($one_lifes as $one_life) { ?>
        <?php echo $one_life['mc_gross']; ?> 
<?php } ?>


So this gives me the values i have a list like this.


200 10 30 200 350


What i need to do is add all these values together and echo one overall amount which would be say 790 for the example.


Any Help Please?


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