Confused About Salary Processing Rules? Let's Clear Up the Contradictions Together

I've checked so many threads on salary processing, but none of them has come out with any conclusive outcome. Rather, they often contradict each other. So, please let me know about the exact salary processing rules. Please post your inputs as early as possible.

Regards

What is your actual query? You have asked a very broad question. What do you mean by salary processing rules?

I've recently joined an organization where manual attendance is the norm. In my previous organization, attendance was automated, and for salary calculation, 30 days were considered. However, here the number of days paid is either 25 or 26, depending on the number of Sundays in a month. I am unsure why this is the case. Could it be due to the Payment of Wages & Minimum Wages Act?

If that is the reason, when settling an employee's account upon their exit, should I deduct 30 days or 25/26 days as applicable for the notice period?

Additionally, in the Full and Final (F & F) settlement procedure, what should be considered - Basic Salary, Gross Salary, or Take-Home Salary?

I apologize for asking multiple questions, but I am in urgent need of answers.