<?php
$comunidad = array
			(
					"1"=>array("com"=>"Andalucia", "num"=>"593.6"),  
                    "2"=>array("com"=>"Aragón", "num"=>"600.3"), 
                    "3"=>array("com"=>"Asturias", "num"=>"582.9"), 
                    "4"=>array("com"=>"Baleares", "num"=>"489.7"), 
                    "5"=>array("com"=>"Canarias", "num"=>"573.2"), 
                    "6"=>array("com"=>"Cantabria", "num"=>"551.5"), 
                    "7"=>array("com"=>"Castilla y León", "num"=>"645.3"), 
                    "8"=>array("com"=>"Castilla la Mancha", "num"=>"555.8"), 
                    "9"=>array("com"=>"Cataluña", "num"=>"568.3"), 
                    "10"=>array("com"=>"Comunidad Valenciana", "num"=>"561.1"), 
                    "11"=>array("com"=>"Extremadura", "num"=>"584.3"), 
                    "12"=>array("com"=>"Galicia", "num"=>"600.1"), 
                    "13"=>array("com"=>"Madrid", "num"=>"613.3"), 
                    "14"=>array("com"=>"Murcia", "num"=>"564.7"), 
                    "15"=>array("com"=>"Navarra", "num"=>"638.1"), 
                    "16"=>array("com"=>"Pais Vasco", "num"=>"637.5"), 
                    "17"=>array("com"=>"La Rioja", "num"=>"562.4"), 
                    "18"=>array("com"=>"Ceuta", "num"=>"539.7"), 
                    "19"=>array("com"=>"Melilla", "num"=>"569.8")
			);
$total = 0;

foreach ($comunidad as $k => $array){
	echo "Número de comunidad: " . $k . "\r\n";
	foreach ($array as $key => $dato){
		if ($key == "com")
			echo "Comunidad: " . $dato . "\r\n";
		
		if ($key == "num"){ 
			echo "Número: " . $dato . "\r\n";
			$total += $dato;
		}
	}
	echo "\r\n";
}

echo "Total: " . $total;