Juanita is saving money for a car. The vehicle she wants costs 7,500 dollars. A relative gave her part of the money she needs before she started saving. She determined she needs to save 80 dollars a week from her paycheck for 42 weeks in order to have the exact amount of money needed to purchase the car. Find the amount of money given to her by her relative before she started saving.
a) $1,000
b) $4,140
c) $5,736
d) $178.57