add_action( 'woocommerce_single_product_summary', 'woocommerce_total_product_price', 31 );
function woocommerce_total_product_price() {
    global $woocommerce, $product;
    // let's setup our divs
    echo sprintf('<div id="product_total_price" style="margin-bottom:20px;">%s %s</div>',__('Product Total:','woocommerce'),'<span class="price">'.$product->get_price().'</span>');
    ?>
        <script>
            jQuery(function($){
                var price = <?php echo $product->get_price(); ?>,
                    currency = '<?php echo get_woocommerce_currency_symbol(); ?>';

                $('[name=quantity]').change(function(){
                    if (!(this.value < 1)) {

                        var product_total = parseFloat(price * this.value);

                        $('#product_total_price .price').html( currency + product_total.toFixed(2));

                    }
                });
            });
        </script>
    <?php
}

function add_gift_wrap_field() {
    echo '<table class="variations" cellspacing="0">
            <tbody>
                <tr>
                    <td class="label"><label>More price: </label></td>
                    <td class="value">
                      <input type="number" name="more_price"/>
                    </td>
                </tr>
            </tbody>
        </table>';
}
add_action( 'woocommerce_before_add_to_cart_button', 'add_gift_wrap_field' );

function save_gift_wrap_fee( $cart_item_data, $product_id ) {

    if( isset( $_POST['more_price'] ) && $_POST['more_price'] != '' ) {
        $cart_item_data[ "more_price_fee" ] = $_POST['more_price'];
    }
    return $cart_item_data;

}
add_filter( 'woocommerce_add_cart_item_data', 'save_gift_wrap_fee', 99, 2 );

function calculate_gift_wrap_fee( $cart_object ) {
    if( !WC()->session->__isset( "reload_checkout" )) {
        /* Gift wrap price */
        // $additionalPrice = 100;
        foreach ( $cart_object->cart_contents as $key => $value ) {
            if( isset( $value["more_price_fee"] ) ) {
              /* Woocommerce 3.0 + */
              $orgPrice = floatval( $value['data']->get_price() );
              $more = floatval($value["more_price_fee"]);
              $value['data']->set_price( $orgPrice + $more );
            }
        }
    }
}
add_action( 'woocommerce_before_calculate_totals', 'calculate_gift_wrap_fee', 99 );

function render_meta_on_cart_and_checkout( $cart_data, $cart_item ) {
    $meta_items = array();
    /* Woo 2.4.2 updates */
    if( !empty( $cart_data ) ) {
        $meta_items = $cart_data;
    }
    if( isset( $cart_item["more_price_fee"] ) ) {
        $meta_items[] = array( "name" => "More", "value" => $cart_item['more_price_fee'] );
    }
    return $meta_items;
}
add_filter( 'woocommerce_get_item_data', 'render_meta_on_cart_and_checkout', 99, 2 );