Hi,

I want to use ‘Professional Plan’, currently I am in trial version. and from the documentation, it is said that I can add ‘function’ extension up to 20000 credits/day/org 

I am sorry but I have 4 questions:

1. is this the ‘function’ feature so I can write deluge script in Zoho CRM?

2. I can’t find ‘function’ in the developer space section

may I know how to access it? do I need to pay additional cost for this?

3. what is 'available through extensions' mean? (at the first image above) , I am worried that I can't write just 'regular' script' in Deluge? 

4. may I know how to calculate 'credit' in function? I mean, how much credit will be deducted If I perform some action?

Thank you