Answer:
$1050.00
Explanation:
The leasing company has a base rate for the first 15,000 miles, but has an additional charge of $500+0.25/mile for each mile over the 15,000 miles.
Bradley has already driven 4,300 miles in first three months.
And he drives a similar amount for the rest of the year. So we can calculate on an average how much distance does he cover each month:
So he has driven 4,300 miles in three months, on an average the distance he drives a month, is:
miles
So over 12 months he drove:
miles
Now, for first 15,000 miles he needs to pay some base rate. Now we will calculate how much extra has he driven beyond 15,000 miles.
So he has driven:

He has driven 2,200 miles extra beyond first 15,000 miles.
So the additional amount he needs to pay is:

Therefore, the additional amount that is in addition to the base rate that he needs to pay is $1050.00.