Posted in "Gen questions thread" but reposting here for more visibility.

Want to make sure I'm understanding mixed-cabin bookings properly.

Currently looking at booking PER-SIN-SFO with PE and upgrading to J. Obviously no PE on PER-SIN.

Does this mean that the cost to upgrade to J would be calculated separately as in 32k for PER-SIN (Economy Standard to Biz upgrade) and then 64.5k for SIN-SFO (PE to Biz upgrade) for a total of 96.5k points? This seems a bit odd to me as it would be more than the cost of the "combined" upgrade from Economy Standard to Business per the chart (94.5k) even though I booked PE for the biggest segment or of course the "combined" cost of Premium Economy Standard to Business (64.5k).