The first, second and third class fares are in the ratio 12 : 7 : 5 between two stations. The passengers travelling in a day are in the ratio 2 : 3 : 5 respectively in the above classes. If the sale of tickets generated a revenue of Rs.33600 that day and if 120 passengers travelled by second class, what was the fare for a first class ticket.

1) 132
2) 144
3) 156
4) None of these