A quick scan of the routing rules on KVS:
FRT1: MPM - AT 20550 VIA NORTH ATLANTIC
FRT: MPM - AT 20550 VIA NORTH ATLANTIC
FOW: MPM - AT 20550 VIA NORTH ATLANTIC
FOW1: MPM - AT 20550 VIA NORTH ATLANTIC
Sure enough, they're all the same. But I thought MPMs were all for one-way travel anyway... i.e., the MPM for the roundtrip would be 41,100 right? I mean, even if you do LAX-CDG-NRT-NOU which is fairly direct, it's 32,072 roundtrip. So it would stand to reason that MPM is always stated as one way and is doubled for round-trip fares.