On a UA flight in booking class C I see earnings of 150% with a minimum of 600 points. YUL-IAD is 485 miles as the crow flies (which usually seems to be rounded up to 500 by SK). A 150% of that should be 750 points or so, should it not? I've got 600 - which does not seem to match either a different (economy) booking class or the expected number. Granted it's only 150 points, but still - what gives?