Answer:
To calculate the interest payable on the $90,000 four-year note, we need to first find the total amount of payments due over the four years.
Each year, the payment due is $25,381. So, over four years, the total payment due would be:
Total payment = $25,381 x 4 = $101,524
Now, to calculate the interest payable on this amount, we need to subtract the original principal of $90,000 from the total payment:
Interest payable = Total payment - Principal
Interest payable = $101,524 - $90,000
Interest payable = $11,524
Finally, to calculate the 5% interest payable on this amount, we simply multiply by 0.05:
5% interest payable = $11,524 x 0.05 = $576.20
Therefore, the interest payable on the $90,000 four-year note at 5% interest is $576.20.