Update price automatically

Hi @basvweb,

This will require some custom coding.

I’ve adapted the following code from this Stack Overflow thread – https://stackoverflow.com/a/35691378/6438880

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

* I recommend using Code Snippets to add custom code to your site.

Hope this helps.
Thanks.