June 2013 Q1 GYM Bunnies

Dear Sir, Good evening!
Asking for your kind assistance.
I am reviewing this question, and I am confused with part B.
The examiner answered the requirement for calculation the maximum price the GB should pay for perfect information about expansion’s exact effect of Membership numbers.
The answer is.
If memeberhip numbers were 6000:
EV-3.42m*3=10.26
Less costs of 360k=9.9m

In this instance, GB would choose option 1(3*3.36)=10.08m
Why $10.08 is chosen?

If membership numbers were 6500:
EV=3.705*3=11.115m
Less costs of 360k=10.755m

In this case, GB will choose option 2

So, if membership numbers are 6000, of which there is a 0.4probability, EV will be 10.08(option1) and if membership numbers are 6500, of which there is a 0.6probability, then EV will be 10.755m(option2)

Therefore, the EV with PERFECT INFO=(0.4*10.08)+(0.6*10.755)=10.485.

I do not understand why EV $10.08 is selected for 6000 members, and not 9.9, calculated. as
EV-3.42m*3=10.26
Less costs of 360k=9.9m.
Thank you very much!