Answer:
Option A - c=$26.13
Explanation:
Given : Amount Financed (m) = $275, Number of payment per year(y) = 12, Number of payments(n) = 18 and APR(I)=12%
To find : The value of c.
Solution :
The formula used to find c is the interest formula,

Where I=interest=12% , m=amount financed=$275 , n=number of payment=18, y=number of payments per year=12 , c=total interest=?
Substitute all the values given,






Approximately c= $26.13
Therefore, Option A is correct.