See, it's this kinda thing that makes me think I would've saved $200. I was once booking an RTW and got given a high YQ. I had 1 short haul leg on AC and one short haul on TG. I was told "you pay the full YQ on the WHOLE itinerary, not on each leg, so the bigger your itinerary gets, the bigger the YQ gets even if it's just on a short haul".
Adding them up leg by leg doesn't work and there's virtually no way to calculate it yourself or even REALLY get super close it seems. When I was quoted $405 for mine, I just kinda thought "well it's in the ball park of what I expected, so I'll go with it".
But another report from someone in a situation like this just makes me question every time they quote me a price. I KNOW the routing rules and MPM etc, but the YQ always seems to be a total crapshoot.