Final answer:
The total amount that must be repaid is $28,098.
Step-by-step explanation:
To find the total amount that must be repaid, we need to calculate the simple interest and add it to the original loan amount. Simple interest is calculated using the formula: I = P * r * t, where I is the interest, P is the principal amount (original loan amount), r is the interest rate, and t is the time in years.
In this case, the principal amount is $23,500, the interest rate is 4.2%, and the time period is 6 years. Plugging in the values, we have: I = 23500 * 0.042 * 6 = $5,598.
The total amount that must be repaid is the sum of the principal amount and the interest: 23500 + 5598 = $28,098.