Answer:
I was taught compound interest this way hopefully it helps.
100 + interest rate / 100 = multiplier
100 + 4.3 = 104.3. 104.3/100 = 1.043
Amount X multiplier to the power of time
82100 X 1.043^2 = 89312.4029
as it is a monetary unit round to 2dp
$89312.40