custom_meta
$meta_query = array( 'relation' => 'AND', array( 'key' => 'package_price_type', ), array( 'key' => 'package_period', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => 'package_price_type', ), array( 'key' => 'package_period', ), );