Answer:
 $800
Step-by-step explanation:
Interest on the loan is calculated using the formula ...
 I = Prt . . . . interest on principal P at rate r for t years
 I = $500Ă0.12Ă5 = $300
The balance is the sum of the principal and interest:
 B = P +I
 B = $500 +300 = $800
The balance due after 5 years is $800.