compute deduction under section 80g

Suppose assesssee Mr. A's salary is Rs. 3,50,000/- and his deduction under section 80 c 1,00,000 and u/s 80 d is Rs. 7,880.

He is contributing Rs. 25,000 to religeous trust which is registered trust for claiming deduction U/s 80 G 50%

Than how much deduction assessee can claim?

I want to Know about " WITH QUALIFYING LIMIT'' & "WITHOUT QUALIFYING LIMIT" IN THIS CONTEST. (fOR 50 % RELIGEOUS TRUST)