try this:
$args = array(
'post_type' => 'post',
'meta_query' => array(
array(
'key' => 'Apple',
'value' => '',
'compare' => 'NOT LIKE'
)
),
'meta_key' => 'Price',
'orderby' => 'meta_value_num',
'paged' => get_query_var('paged'),
'order'=> 'DESC',
);
$the_query = new WP_Query( $args );