From the very beginnings of REGprint publishing, Hrvoje Kokot has regularly been writing interesting articles dealing with investments and calculations analyses. The importance of calculations is unquestionable, because the right investment into equipment is what generates profit in “good” times, but also helps to survive in difficult ones, such as are the ones we currently live in. The author started off with a question what had happened in the last four years of CROprint, or REGprint, publishi