Cost of acquision

you can show those expenses as either cost of acquisition or cost of improvement. make sure that whatever you claim is substantiated by material evidences

are the bills available

No,the bills are not available now.

then it wud be difficult to claim deduction since if your case comes up for scrutiny then you will be required to provide the proofs

ok thank you to both of you.

Since cost of improvement was incurred during 2007 which is more than six year back, no evidence must be required by IT authority.

@ kamal PLS note that the onus is always on the assessee to prove and produce the details in respect of deductions claimed by him. the AO only verify the genuineness of such details produced by the assessee. so if you do not produce any details then no deduction will be allowed as such. this is normally all AOs point of view