How To Calculate One Day Salary For 31days Month And 28 Days Month

I've gone through the thread discussion, but I've not been able to resolve my issue. I have a staff who has joined on 5th Feb. When counting working days, do I count 28 minus 4 days or do I count number of days present, ie 6 days a week which equals 21 days?

How can be calculate 70% salary of an employee for a day only.

Dear All
If Gorss Salary - 13600/- Per months
Earning Gross In months - 4533 /-
How to Calculate Day - ?

Hello there,
In our company, we calculate salary based on number of days in a month 28, 30, 31, the no.of days of that month
Let's say, employee salary is 30,000 per month, salary month is June (30 days), and employee worked without taking any leave for that month ( excluding Sundays and public holidays )
Final salary = (30000/30) * No.of working days
Let's assume, In June, there are 5 Sundays and 1 public holiday
Do we need to include the Sundays and other public holidays in "No.of working days" or exclude from the total No.of days ( 30 days )
No.of working days = 30 or ?
No.of working days = 24 ?
Final salary = (30000/30) * 30 ?
Final salary = (30000/30) * 24 ?
Please clarify
Thanks in advance :)

Why confusion here, please go with standard practice.

Fixed gross salary :

For 31 Jan,Mar,May,July,Aug,Oct,Dec Months
(100000 x 31 = 3225.806452)* No of Payable days

For April,June,Sep,Nov
(100000 x 30 = 3333.333)* No of Payable days

For Feb
(100000 x 29 = 3448.275862 ) * No of Payable days
(100000 x 28 = 3571.428571) * No of Payable days

Now per day amount arrived and do multiplication with no of payable days.
Thanks