//Hide price and add-to-cart button for non-logged in users.

function woocommerce_template_loop_price() {
    if ( is_user_logged_in() )
        woocommerce_get_template( 'loop/price.php' );
}

function woocommerce_template_loop_add_to_cart() {
    if ( is_user_logged_in() )
        woocommerce_get_template( 'loop/add-to-cart.php' );
}

function woocommerce_template_single_price() {
    if ( is_user_logged_in() )
        woocommerce_get_template( 'single-product/price.php' );
}

function woocommerce_template_single_add_to_cart() {
    global $product;

    if ( is_user_logged_in() )
        do_action( 'woocommerce_' . $product->product_type . '_add_to_cart'  );
}