The interest rate for a year or 12 months is 7% (0.07).
Counting the months from August to December is 5 months.
So the interest rate for 5 months is equivalent to:
i = 0.07 * (5/12)
i = 0.0292
The interest expense would be:
expense = $59,000 * 0.0292
expense = $1721
Therefore the answer is letter B.