I solved it by editing this function “wpa_wcpb_onchange_input_check_total_discount” at
“wp-content/plugins/wpa-woocommerce-product-bundle/assets/js/wcpb-frontend.js”
from this
jQuery(‘.px-product-bundles input[type=checkbox]:checked’).each(function(){
var parent = jQuery(this).parent().parent(),
price = parent.attr(‘data-item-price-with-filter’),
new_price = parseFloat( price ) – parseFloat( price ) * parseFloat( bundle_percent ) / 100;
to this
jQuery(‘.px-product-bundles input[type=checkbox]:checked’).each(function(){
var parent = jQuery(this).parent().parent(),
price = parent.attr(‘data-item-price-with-filter’),
price=parseFloat( price.replace(‘,’, ”) ),
pricepercent=(price * parseFloat( bundle_percent ) / 100),
new_price = parseFloat( price ) – pricepercent;