dont return a price if all you have is price list

procs/guidance_logic.ms.sql

@@ -29,6 +29,13 @@ BEGIN
         RETURN;
     END;
 
+    -- Early exit if only list price is available
+    IF @target IS NULL AND @last_norm IS NULL 
+    BEGIN
+        INSERT INTO @ret VALUES (NULL, N'Only List price is available, disregard');
+        RETURN;
+    END;
+
     -- Pick starting base price
     SET @base_price = COALESCE(@target, @last_norm, @list_eff);
     -- Reason text