Investors & landlords

Thankyou.

I don't know which one is the correct cost basis, that is my confusion.

The one in 1e is different from the one in supplemental. But I think the one in 1e is reported to IRS I think, so if I use the one in supplemental there will be difference between what is being reported to IRS vs what is being filed. So, my question is which one should I use when I don't know which one is correct?