This toner mass information, together with certain toner constants and known parameters, is used by {HEAD ~ the logic and control unit} to calculate {TAIL ~ the toners charge} to mass ratio 
This toner mass information , together with certain toner constants and known parameters , is used by { HEAD ~ the logic and control unit } to calculate { TAIL ~ the toners charge } to mass ratio
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH