Hi,
It is because we have used "fancySelect" plugin to replace the ordinary select boxes to stylish select boxes.
Since the select box are not react as "select box" anymore, after changing; it doesn't trigger the Virtuemart price update function.
You can disable the fancySelect plugin for Virtuemart custom field select boxes by following:
1- open this PHP file:
ROOT/emplates/flexible_stylemart/tpls/blocks/head.php
2- Find this line:
$('select.inputbox, .product-field select').not('.product-field.product-field-type-A select, .product-field.product-field-type-E select').fancySelect();
3- replace it with this:
$('select.inputbox').not('div.product-field select.inputbox').fancySelect();
Then, fancySelect will be disabled for custom fields and the PriceUpdate function will be properly triggered properly.
Regards.
Support