It Varies From School To School and It Totally depend upon your school But I can Give You Some Idea About How much Difference of Fees Would be

Its Basically depending on How much Subjects you have optioned for Like More the Subject Related To Labs Or Activities like Physical Education Or Informatics Practices Or Computer Science You Fees Might be Higher In Majority Cases And If You have an additional Subject Fees will Increase But In case Of Hindi or some Non lab related subjects it wont charge .

SO ITS TOTALLY DEPENDENT ON YOUR CHOICE OF SUBJECTS