If you look at the Server Backup Lite/Basic tab, it works like a charm. But when you check the Server Backup Pro tab, if you fill in the amount under "Aantal", nothing happens. The price for one server is 0.00. However, when you add another item with "Server Toevoegen", the price is changed from 0.00 to whatever amount you filled in times the value of the field.
I managed to figure out it does not work with one row, seeing as the Server Backup Lite/Basic tab works fine. But for the life of me I can't seem to figure out how to solve it.
Does anyone have a solution to this? I have included the code in the .php, the css and js for the tabs come from tabber.js and example.css (See source code or attachments).