Since the painter charges $15.18 each hour, we would multiply 15.18 by 4 hours
15.18 x 4 = $60.72
The painter would charge you $60.72 without the supplies, to find how much the supplies costed do the total earnings minus the $60.73
$141.69 - $60.73 = $80.96
The supplies costed $80.96
