Answer: the correct answer is $1,770
Explanation: Interest is calculated by multiplying the principal times the time period the note is redeemable. It is important to bear in mind that all interest are annual unless it is stated differently. This note renders 12 % annually. At December 31 two months of interests are payable and must be recognized as interest expense. Having said that the calculation is as follows:
December 31 : $88,500 * 12% *(2/12) = $1,770