Answer: P = $ 12000 
 
r = 14% 
 
t = 1 (for first year) 
 
I = (P X r X t)/100 
 
∴ I = (12000 X 14 X 1)/100 
 
 = 120 X 14 
 
 = $ 1680 <---------- (Interest on loan at the end of first year) 
 
∴ Total amount owing at the end of first year = (P + I) 
 
 = (12000 + 1680) 
 
 = $ 13680 
 
Repayment = $ 7800 
 
Amount still outstanding (at the start of second year) = 13680 - 7800 
 
 = $ 5880 
 
Interest on the outstanding amount at the end of second year, 
 
P (new) = $ 5880 
 
r (same) = 14% 
 
t = 1 (for the current second year) 
 
∴ I = (P X r X t)/100 
 
 = (5880 X 14 X 1)/100 
 
 = 82320 / 100 
 
 = $ 823.2 <-------------------------- (Interest on outstanding amount at the end of second year)