Rajender is working as a delivery boy in a multinational company. The company is paying him ₹90 per delivery. In a fortnight comprising 15 consecutive working days, his average earnings per day was ₹540. If his average earnings of the first 7 days was ₹519 per day and that of the last 7 days was ₹546 per day, then what was his earning on the 8th day of the fortnight?