Using meta_query to Query Posts by Postmeta

$args = array(
	'post_type' => 'product',
	'meta_query' => array(
		array(
			'key' => 'price',
			'value' => '15.00',
			'compare' => '<',
			'type' => 'NUMERIC'
		),
		array(
			'key' => 'size',
			'value' => 'S',
			'compare' => '=',
			'type' => 'CHAR'
		),
		array(
			'key' => 'sex',
			'value' => 'men',
			'compare' => '=',
			'type' => 'NUMERIC'
		)
	)
 );
$query = new WP_Query( $args );


$args = array(
	'post_type' => 'product',
	'meta_query' => array(
		array(
			'key' => 'price',
			'value' => '15.00',
			'compare' => '<',
			'type' => 'NUMERIC'
		),
		array(
			'key' => 'size',
			'value' => 'S',
			'compare' => '=',
			'type' => 'CHAR'
		),
		array(
			'key' => 'sex',
			'value' => 'men',
			'compare' => '=',
			'type' => 'NUMERIC'
		)
	),
	'meta_key' => 'price',
	'orderby' => 'meta_value',
	'order' => 'ASC'
 );
$query = new WP_Query( $args );