Answer:
First we know he received a commission of 10% on all worth he sold  given by 10% of 3500 =10%*35000  =10/100*3500=350
Then the total earnings are 500 thus money per hour is
total earned - commission   =500-350=150
And this money was 10% of hours worked so we now ask ourselves  if 10% was 150 what about 100%
10%=150
100%  × ? then we cross- multiply
(100%*150)/10% Â = Â 1500
Step-by-step explanation: