Answer:
a). 6 Years
Explanation:
Well here I have to make a timeline details, in fact, today the average hourly hour of work is $ 10 depending on the state the average oscillates in this value
So:
$ per day
$ per month
$ per year
However the half is about bills, food, transporter and fixed costs, so, annually she can spend about the 30% of his salary to paid.
$ to pay 15000 each year
So take about 6 years recover her investment and earning money