A man purchased a house valued at Rs 3,00,000. He paid Rs 2,00,000 at the time of purchase and agreed to pay the balance with interest at 12% per annum compounded half-yearly in 20 equal half -yearly instalments. If the first instalment is paid after the end of six months from the date of purchase, find the amount of each instalment. [Given log 10.6 = 1.0253 and log 31.19 = 1.494]