| Item description | Face 1 | Face 2 |
| Maximum production capacity (tonne/day) | 1600 | 2000 |
| Fe (%) | 63 | 58 |
| Production cost of ores (in INR/tonne) | 1500 | 1200 |
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?