How shall we credit the salary of an employee if he has resigned during the probation period and notice period as mentioned in offer letter is 4 weeks?

Dear All,
Kindly check the details below and suggest me how to pay salary in this case?
Date of joining- 16th May'18
Date of resignation- 17th Aug'18 (reason-relocating to other city)
Last Working Day- 17th Sep'18
Notice period as per probation period rule of company- 4 weeks.
Yearly Gross salary-INR 400000/-
Basic Salary-INR 200000/-
Shall the company should pay full salary or only basic salary of Aug'18 & 17 days salary of Sep'18 or shall hold 50% salary of Aug'18 ?
Kindly, suggest.

Please confirm when is the last working of the employee. is it 17th of September? or the employee is not serving the notice period?

Dear Rahul Chhabra,
LWD is 17th Sep'18.

Dear Richa,
The employee is serving the required notice of 4 weeks. Under such a circumstance, employee's full salary for the month of August and 17 days in September will be generated. You may release August salary by month end (if your company policy allows) and release 17 days of September as F&F post clearance is done.
Regards
Rahul Chhabra

Dear Rahul,
I would like to highlight that in her offer letter it is mentioned that-"During the probation period, the written notice is of four week or basic salary in lieu thereof on either side."
So, just wanted to understand he shall be paid basic salary or full gross salary?

"During the probation period, the written notice is of four week or basic salary in lieu thereof on either side."
It means that if the employee doesn't give notice of 4 weeks, he/she has to pay basic salary for 4 weeks against it. As she has given notice, she is eligible for full salary.
please consult your seniors in HR or finance in your organization for a better understanding of this.
Rahul