In a city, 15% of households earn less than Rs. 25,000 per year, 8% earn more than Rs. 1,50,000 per year, 25% earn more than Rs. 75,000 per year, and 1,200 households earn between Rs. 25,000 and Rs. 75,000 per year. How many households earn between Rs. 75,000 and Rs. 1,50,000 per year?