Shri Ram College of Commerce, University of Delhi

The direct method is the merit-based method, which means you get admission based on your score in graduation, in your case 84.3%. Exam-based method is where you have to appear for an entrance exam conducted by the college itself and your admission would depend on the marks you score in this entrance. You can either go for Masters (M.Com/ MA in economics) or GBO (which is equivalent to a MBA).

Usually, a minimum of best of four 97.5%/97.8% is required. That's the minimum. Scoring a 98 or above would be on the safer side.
Maths is required as one of your subjects in +2, and you need to pass in it. However, it's usually not calculated in the best of four.

Usually, the cut-offs for general category is close at 98%/97.8% maximum. But if you have any reservations, you do have chances to get in, depending on the session's cut-offs.

SRCC offers PG in Global Business Operations (GBO) which is equivalent to an MBA. Admission is done through entrance and group discussion. An exam is conducted by the college and selected students on the basis of merit are invited for the GD. Here are some useful links-
http://www.srccgbo.edu.in
http://www.srcc.edu/academics/admissions/admission-procedure/postgraduate
http://srccgbo.edu.in/Courses.php

The registration for DU applications will be online during 2nd or 3rd week of May. That's the first step. Keep yourself updated with information on the websites http://du.ac.in/du/ and news channels.

No. Maths as a subject in +2 is really important. But its not compulsory to add maths for your best 4.

It is approximately INR 30,000 per annum for B.Com (Hons).

It was until last year i.e. 2017.
Stay updated on this year's admission procedure. It might be on the basis of entrance marks. I am not sure.

The college fee is approx. INR 30,000 PA and the hostel fee is approx. INR 90,000 for boys and approx. INR 1,00,000 for girls.
You need to get the pass marks in maths. It's not compulsory for you to add maths in the best 4 subjects.

It's based on your class 12th percentage. But this year, there might be an entrance test. It's not confirmed yet.
Stay updated.