diff --git a/agent.py b/agent.py
index 43edf47..1d9c33f 100644
--- a/agent.py
+++ b/agent.py
@@ -344,7 +344,7 @@ def _build_comparison_result(comparison_id: str, quotes: list[QuoteInput], weigh
             }
         )
 
-    rows.sort(key=lambda row: (-row["scores"]["weighted_total"], row["total_price"], row["delivery_days"], row["vendor"].lower()))
+    rows.sort(key=_quote_sort_key)
     winner = rows[0]
     recommendation = {
         "vendor": winner["vendor"],