If the sample interest on a sum of money 10% per annum for 2 years is $1200, find the compound interest on the same sum for the same period at the same rate? Choose the correct choice:
A) $1260
B) $1520
C) $1356
D) $1440
E) $1210
Rate = 10%   Time = 2years   S.I. = $1200   Principal = 100*1200/10*2 = $6000   Amount = 6000(1+10/100)^2 = $7260   C.I. = 7260-6000= 
<gadget id="calculator">7260-6000</gadget>
<output>1_260</output>
$1260   $1260nswer is $1260
<result>A</result>
If the sample interest on a sum of money 10% per annum for 2 years is $1200, find the compound interest on the same sum for the same period at the same rate?