Want to give QR a go over SQ for my trip to Vietnam ex UK later this year, especially as I can earn UA miles with certain booking classes (in Y).

How do I determine the booking class of the fare I am quoted? Have looked at the Fare Rules text and I can see BK: K and FCL: KLPE3MGB. Does this indicate that I am booked in K class?

That would seem obvious to me and would be great as K class is eligible for 100% mileage accrual (on QR and also UA Mileage Plus), however I'm confused, as the fare summary panel says that this fare will only accrue 50% of miles