Sorry, I didn't read the question properly.
The easiest way to get the sum total of your uploads is to loop through them and add the file sizes together:
//This will contain our total file size.
$totalSize = 0;
//Loop through each record and add its file size to the totalSize variable
foreach($blogRecords[0]['uploads'] as $upload) $totalSize += filesize($upload['filePath']);
//Convert to MB
$totalSize = round($totalSize * .0009765625 * .0009765625, 2);
//Display result
echo $totalSize."MB";
You'll need to change the initial variable in the foreach loop to use the variable that contains your array of images.
Thanks!
Greg
Greg Thomas
PHP Programmer - interactivetools.com