$tax_query_args = array(
                    'post_type' => 'product',
                    'tax_query' => array(
                        array(
                            'taxonomy'  => 'product_type',
                            'field'     => 'name',
                            'terms'     => 'simple',
                        )
                    )
                );
                $tax_query = get_posts($tax_query_args );
                global $grouped_product;
                foreach ($tax_query as $post ) {
                    global $post;
                    $price = get_post_meta( get_the_ID(), '_price', true );

            ?>