How to show the original price in the cart?

This code will show the sale price of all the products in the cart:

if ( sizeof( $woocommerce->cart->get_cart() ) > 0 ) {
	foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
		$_product = $values['data'];
		echo woocommerce_price( $_product->sale_price );
	}
}