Give the step-by-step reasoning process and then the final answer. Briar is attending a one-week community empowerment event and has to take a cab ride to the event and back home every day. A cab ride costs $2.5 per mile. If the event is 200 miles away from Briar's home, calculate the total amount of money the cab rides cost would be at the end of the event?
If a cab ride costs $2.5 per mile, and Briar has to go to an event 200 miles away, he will spend 200 * $2.5 = $500 one way to the trip. Since the round trip is also 200 miles and Briar is charged $500, the total amount he spends in a day to go to the event and back is $500 + $500 = $1000. The event is one week, meaning Briar will have to spend $1000 * 7 = $7000 on the cab rides.
The final answer: 7000.