Explanation:
The journal entries are as follows
On January 1, 2012
Cash $20,000
To Note payable $20,000
(Being the issuance of the note payable is recorded)
On January 31, 2012
Interest expense $116.67
Note payable $362.25
To Cash $478.92
(Being the first monthly payment is recorded)
The interest expense is as follows
= Borrowed amount × monthly interest rate
= $20,000 × 0.5833%
= $116.67