Why do I have an 8453 when form 8949 is attached? On Part II (F) it has amounts but says see attached. What would I attach? It is for a home that we flipped.

I can use the closing statement for the sale, but for the purchase it is the purchase price plus about 300 receipts to get to the purchase price.  Should I have don this on a different form.  This is the only flip I have ever had and don't plan to do another one in the near future.