The total amount that must be repaid will be "$18,630".
Given values are:
Loan amount,
Interest rate,
Time to repay,
As we know, the formula of simple interest,
→ 
By substituting the values, we get
→ 
→ 
→
($)
hence,
The total amount must be paid will be:
= 
= 
=
($)
Thus the above approach is correct.
Learn more about simple interest here:
brainly.com/question/22970684