Yes, you will report the net cash that you received back from the exchange on line 15.
If the other party assumed your loan than you will also include that on Line 15.
Let me know if you have any question.
Please note: This advice is provided with the understanding that all the relevant facts have been provided by you. Any change in facts might affect the advice given and hence may not be relied on in such cases. Nothing contained in this reply was intended or written to be used, can be used by any taxpayer, or may be relied upon or used by any taxpayer for the purposes of avoiding penalties that may be imposed on the taxpayer under the Internal Revenue Code of 1986, as amended.
Why do you come up with different closing costs than what the exchange company had?
In that case, you should consider the exchange expenses based on what they have it provided to you. So the net cash you receive will be the cash after the payoff the the exchange expenses and that will be the amount to be reported on Line 15
I am providing a link to the regulations in order to provide you some more detailed information relating to the Loan that you assume(and the loan given up) as a result of the exchange.
I will be gone for some time but will answer your follow up question, if any, after I return