Investors & landlords

I have a follow up question.  First of all, thank you for the example listed above. It helped out tremendously. I was able to divide the sales price among all the assets.  One question I do have is the last column - Cost of Sale.  That is 10% of the original cost basis - does that appear on Form 4797 anywhere or do I add that to something else? And where was the 10% derived from? 

I am honestly trying to understand all this, so if I shall do this again, I better prepared.

 

Thank you Critter-3!