Unable to hook wpcf7calculate function

Hi Petko, new Pro user here (under a different name), thanks for the awesome plug-in.

I have a rather complex form that must calculate pricing based either on a per-day or per-week basis depending on other selections. For my form, it would be super helpful if the plug-in could implement a basic logical operation like an immediate if, but I’m sure you’ve heard that ??

To work around the lack of an if test, I’m trying to perform my own calculations in JavaScript by hooking the wpcf7calculate function, as described in section 7.2 of your documentation, but it is not working for some reason.

I’ve tried both the supplied code, as well as wrapping that code in a document.ready function. Either way, my function never gets called.

I’m an old C# programmer, and new to JavaScript and PHP, so perhaps there is something simple I am missing?

Thanks in advance.

The page I need help with: [log in to see the link]