I didn't win this project. Write:
1. A gracious reply (under 80 words) that thanks them, wishes the project well,
   and leaves one open door relevant to their business (no hard sell).
2. A 3-question feedback ask they can answer in under 2 minutes (multiple
   choice where possible): what decided it, how my price compared, what
   would have changed their mind.
3. A note for my own records: 3 hypotheses for why I lost, based ONLY on
   the context below, and one experiment to test next time.

Context (their message + my proposal summary):
"""
{{paste}}
"""
