Final answer:
The amount due at maturity for the loan is $19,359.
Step-by-step explanation:
To calculate the amount due at maturity, we need to find the remaining balance at the end of 3 years.
Step 1: Calculate the interest for the first 3 months. The interest is 2.5% of $23,680, which is $592. To find the new balance, subtract the partial payment of $4,350 from the original loan amount and add the interest: $23,680 - $4,350 + $592 = $20,922.
Step 2: Calculate the interest for the next 3 months. The interest is 2.5% of $20,922, which is $523. To find the new balance, subtract the partial payment of $2,590 from the previous balance and add the interest: $20,922 - $2,590 + $523 = $19,855.
Step 3: Calculate the interest for the remaining 2 years and 6 months. The interest is 2.5% of $19,855, which is $496. To find the final balance, subtract the remaining partial payment of $496 from the previous balance: $19,855 - $496 = $19,359.
Therefore, the amount due at maturity is $19,359.