im not that good at maths (top set in third year, i mightbe; but i hate maths) i just worked out the sum and used a calculator; its not that hard to work out.
and i think the codes will just be random 12 digit codes, or itd be easy to cheat the system.
and it had a beta artist listed on those cards, so it probably just is a beta number
Danians: Ants with GUNS!!