WooCommerce Change empty price text

gistfile1.php

// Change empty price
function custom_empty_price( $price, $product ) {
	return __( 'Call or Email for price', 'WooCommerce' ) ;
}
add_filter( 'woocommerce_variable_empty_price_html', 'custom_empty_price', 10, 2 );
add_filter( 'woocommerce_empty_price_html', 'custom_empty_price', 10, 2 );