Carrie wants to buy a new iPhone. The new iPhone costs $800. She can trade in her Samsung Galaxy for $240. She can make $80 per week babysitting. How many weeks does she have to work before she can purchase the iPhone?
The total cost of the iPhone will cost Carrie $800 - $240 = $<<800-240=560>>560.
It will take her $560 / $80 = <<560/80=7>>7 weeks to earn enough money.
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