First, we will find the amount of money she will pay in 48 months
Since she pays $273.53 for 48 months, then

Since she paid a $2000 down payment
Then we will add 2000 to 13,129.44 to find the total amount she paid

Now, we will subtract the price of the car from it to find the finance charge
Since the price of the care is $12,785, then

She will pay $2344.44 for the total finance charge