Shannon received a credit card offer in the mail. she applied for the credit card and received a card with a limit of $500. shannon's introductory apr was 0% for the first nine months. after that, her apr for purchases will be 19.99%. shannon immediately makes purchases on her credit card worth $300 and each month makes minimum payments of $15. what will the balance be on shannon's card at the time the apr for purchases starts applying to her balance? select the best answer from the choices provided. $365 $135 $335 $165