| Payment month | Loan balance (dollars) | Monthly payment (dollars) | Interest portion of payment (dollars) | Principal portion of payment (dollars) |
| 1 | $20,000 | $617.54 | $116.67 | $500.88 |
| 2 | 19,499.12 | 617.54 | 113.74 | 503.80 |
| 3 | 18,995.32 | 617.54 | 110.81 | 506.74 |
| 4 | 18,488.58 | 617.54 | 107.85 | 509.69 |
| 5 | 17,978.89 | 617.54 | 104.88 | 512.67 |
| 6 | 17,466.22 | 617.54 | 101.89 | 515.66 |