A credit card is charging interest of 36% p.a. compound monthly. If peter uses it for making a purchasing of $1,000, $1,500 and $800 on 2^nd January, 10^th January and 20^th January respectively. During the period, he has made no repayment. Assuming that interest is the only finance charge, and the interest is calculated by the Average Daily Balance method, what is the finance charge on him for January?