refund of ITC on export of goods

i am filing RFD-01A for getting refund of input tax credit. But there is one thing that is "Net Input Tax credit". i can't give proper answer of it so please give me solution from following answers.

1) "Net Input Tax credit"= Total tax paid on inputs...
OR
2) "Net Input Tax credit"= Total tax paid on inputs- total tax collected on outputs.....
which answer is right???