4. A household uses the following appliances every day:
(i) Refrigerator: 400W for 8h
(ii) Ceiling fan: 120W for 6h
(iii) LED TV: 100W for 3h
If electricity costs Rs 6 per kWh, what will be the electricity bill for 30 days?
(a) Rs 786
(b) Rs 760
(c) Rs 706
(d) Rs 846