First we must add up all of the hours that were worked:
[tex] 1.5+3.5+2.75=7.75hours [/tex]
Now since the technician makes $15.75/hour, we must multiply by the number of hours they worked:
[tex] 15.75*7.75=122.06 [/tex]
So now we know that the surgical technician made $122.06 in gross salary for that day.