This question (and there are a few very similar to it) reads:

(Refer to the images)
Take-off mass: 150 000 kg
Planned cruise at FL 350
Long range MACH
Standard Atmosphere (ISA)
CG: 37%

You have to cover an air distance of 2 000 NM.

Your flight time will be (minutes):

(a) 303
(b) 359
(c) 288
(d) 298

The given solution uses 150,000kg as the entry mass for the integrated cruise table. However, I was of the opinion that the integrated cruise tables required the *mass at start of cruise* to be used, in which case this would be 150,000kg less the climb fuel (2,100kg) = 147,900kg.

Is this correct?