Answer:
The correct option is C). $112.50
Explanation:
Amount Financed (m) = $600
Number of Payments per year (y) = 12
Number of Payments (n) = 24
APR (I) = 18%

Now, c can be calculated by using the formula :

Hence, The required value of c = $112.50
Therefore, The correct option is C). $112.50