Janessa wants to pay off her credit card balances within 12 months. She is trying to decide if she should use her $1,000 in savings to pay off part of the balances or if she should transfer the balances to a new card with a low introductory rate. The new credit card has an introductory rate of 6.5% but charges a balance transfer fee of $50 for each balance transfer. Janessa decides to pay of Credit Card B and $420 of Credit Card A, then transfer the remaining balance of Credit Card A to the new card. Which of the following options shows the amount of Janessa's new monthly payment?