As an associate at staples I know staples does not carry the updated z3775 version of this tablet (no associate discount for me). If you go into their store and look at the spec sheet it will list a cpu running at 2.4ghz(z3775) but in reality its 1.8ghz(z3740) so it can be pretty confusing.
If you want to confirm you can look at task manager(press ctrl + shift + esc) and under the performance tab you will see the cpu listed.