It was actually 534.9**. Listen carefully and you'll hear the audio snipped--for both teams--right after the 9. Odd. Another bit of odd editing is the Trotters, who seem to be solving the problem in reverse ("up to 418,000...add some more"); no final inspection, just the clue reward (mistranslated btw; mabrouk مبروك means "congratulations," not "correct").