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?