The ratio of the prices of two mobiles I-phone 9 and I-phone X was 13 ∶ 20 last year. In current year, the prices are drop by 10% of I-phone 9 and that of I-phone X by Rs. 20,000. If their prices are now in the ratio 117 ∶ 160. Find the price of I-phone 9 in last year.