Can someone pour some clarity on this situation?

When people quote gH/s do they really mean mH/s?

Doesn't the scale go Kilo Mega Giga

IE if I have 2x600 kH/s... that is equal to 1.2 mH/s and not 1200 mH/s

Most of the only calculators ask for your MH/s but say you are expected to make
and average of 0$ a day at 1.2 mH/s and $4.xx if its 1200 mH/s.. when 1200 kH/s gets you $4.xx