With the code below, I calculate and displays the total subsidies amount based on cart item shipping class and quantity: /** * Utility function: Get shipping class subsidy amount * * @return float */ function get_shipping_class_subsidy_amount( $shipping_class ) { // return a float number for '12-50' case if ( false !== strpos($shipping_class, '12-50') ) { return 12.5; } // Extract the integer from the slug else { return preg_replace('/\D/', '', $shipping_class); } } /** * Utility function: Get total subsidies amount * * @return float */ function get_total_subsidies( $cart_items ){ $total_subsidy = 0; // Initializing // Loop through cart items foreach ( $cart_items as $item ){ $subsidy = (float) get_shipping_class_subsidy_amount( $item['data']->get_shipping_class() ); $price = get_post_meta($values['product_id'] , '_price', true); if ( $subsidy > 0 ) { $total_subsidy += $item['quantity'] * $subsidy; } } return $total_subsidy; } /** * Display HTML formatted total subsidies amount in classic cart and checkout pages. * Hooked function. */ function display_total_subsidies() { if ( $total_subsidy = get_total_subsidies( WC()->cart->get_cart() ) ) { echo '<tr class="subsidies"> <th>' . esc_html__( 'Subsidies', 'woocommerce' ) . '</th> <td data-title="' . esc_html__( 'Subsidies', 'woocommerce' ) . '">' . wc_price($total_subsidy) . '</td> </tr>'; } } add_action ( 'woocommerce_cart_totals_before_shipping', 'display_total_subsidies', 10 ); // for Cart page add_action ( 'woocommerce_review_order_before_shipping', 'display_total_subsidies', 10 ); // for Checkout page The problem is that the cart item subsidy amount is obtained twice when it's a bundle product, as it takes into account the bundled product itself and it's products components. But the calculation in the label is correct.