Answer:
he worked for 6 hours and 30 min
Step-by-step explanation:
what you do is take 53.30 and divide it by 8.20
SI=PTR/100
SI=15500*4*6.5/100
SI=403000/100
SI=4030$
180
=216-(-83)+(-479)
=216+83-479
=299-479
=180