0 units from block 1-30 at Rs. 7.85/kWh = 30 kWh x 7.85 Rs/kWh = Rs. 235.50
30 units from block 31-60 at Rs. 7.85/kWh = 30 kWh x 7.85 Rs/kWh = Rs. 235.50
30 units from block 61-90 at Rs. 10/kWh = 30 kWh x 10 Rs/kWh = Rs. 300.00
30 units from block 91-120 at Rs. 27.75/kWh = 30 kWh x 27.75 Rs/kWh = Rs. 832.50
6 units from block 121-180 at Rs. 32/kWh = 6kWh x 32 Rs/kWh = Rs. 192.00