They must know three things: They must have good handwriting, because the data is handwritten; they must be able to read; and they must be able to do multiplication, division, addition and subtraction in their head.
Jos turi atitikti tris reikalavimus: gerai rašyti, nes duomenys rašomi ranka; gerai skaityti ir sugebėti mintinai dauginti, dalinti, sudėti ir atimti.