Jane has a difficult time managing her money and often lives paycheck to paycheck. Upon finishing her taxes, she was pretty excited because she return showed a tax refund of $2,500. If she had filed electronically, she would have received her tax refund of $2,500 in full exactly 1 month after she filed the return. Because she was desperate for cash, she instead turned to Sally to get her refund immediately. Sally charged Jane $100 to advance the tax refund. So, Liv received $2,400 ($2,500 - $100) immediately and signed an agreement to have her tax refund deposited into Sally bank account. Assuming a 12-month year, what is the effective annual rate of interest that Jane was charged for the tax-refund advance, assuming that the $100 fee is in reality interest paid to Sally?