Respuesta :

first find out the rate

1337 x 0.04 = 53.48 

it depends on how much interest per ?
so if it is monthly, 
14 x 12 (per month) = 168
168 x 53.48 = 8984.64
8984.64 + 1337 = 10321.64
(this is just an example)


hope this helps :D