A stock trading at $10 on Jan 1st announces a dividend of $1 on Jan 2nd, with wn ex-dividend date of Jan 15th, and with the dvidend payable on Jan 31st. Assuming there is no other news surrounding the stock and nothing else affects the stock price in this period, except the dividend, what is the price of the stock on Jan 20th? (Answer in dollars, so if the answer is $45.60, answer 45.6)