HRA And IT Exemption U/s 10

Hi all,
I need help for HRA and IT exemption u/s 10
I am getting HRA for Rs.3,500/- pm and actual house rent paying Rs.2200/- pm and my salary is 15000/-pm (including basic+DA+HRA)
Then what is my HRA exemption for IT?
Kindly advise in these regards.
Thanking you,
BYRAPPA KG
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HRA exemption
50% of (basic+DA) in case location Mumbai, Kolkata, Chennai, Delhi
40% of (basic+DRA) in case lication other cities

all about salary details is given here
INCOME FROM SALARY INCOME CALCULATION | SIMPLE TAX INDIA