Hi albertajuelo and kTimesG

thank you both for your replies, especially albertajuelo's detailed explanation was very helpful!
While being here to solve the puzzle, the process itself has become more interesting than the price itself. The parallel computing power of GPUs it will become my next learning endeavour.
albertajuelo and kTimesG if not bothering you, please DM me as I cannot send you as a newbie (bitcointalk by default has deactivated the option to receive from newbies DMs)
Thanks