Update app.py

app.py

@@ -542,7 +542,7 @@ def parse_and_execute_model_tool_output(model_text: str, history: Optional[List[
                 for k in ("amount","price","rate","item"):
                     if k in it:
                         try:
-                            amount = float(str(it[k]).replace("$","").replace(",",""").strip())
+                            amount = float(str(it[k]).replace("$","").replace(",","").strip())
                             break
                         except Exception:
                             continue