How to calculate calibration with eyepiece graticule and micrometer

What each eye piece is worth: - Count stage divisions (epg 10) - Calculate the actual size of the stage divisions (each is 10 micrometers) - So, 10 x 10 = 100 micrometers - Work out the size of 1 epd (total size/no. of epd) - So each epd = 1 micrometer