$860 is the principal amount. Therefore, choice A is right.
Simple interest rate is 1.6 percent.
$55.04 after simple interest.
t = 4 years
We must ascertain the principal sum.
Simple interest
The formula for simple interest is:
pxrxI
100
Substitute the given values.
D x 1.6x 4
55.04
100
5504 = 6.4p
5504
6.4
860 = 0
The principal value is $860. So, option A is
correct.