How did you calculate the 1360$? At 65$ per chip it would total 65*5*10=3250$
Obviously they are charging the crap out of this chip because they are the only ones that have it.
no need to calculate.
They listed price as 8300 RMB that is = $1360.
Source:
http://www.cybtc.com/thread-4792-1-1.html