An electricity bill calculator

A home has four appliances, each with a power and the hours it runs each day. One unit costs ₹$6$. You will make the program find the units each appliance uses in a day, the units for $30$ days, and the cost. Then it draws the daily units as bars.

The idea. Units (kWh) $=$ power in kW $\times$ time in hours, and cost $=$ units $\times$ price.

Your tasks.

1. Inside the loop, work out units, the kWh that one appliance uses in a day.
2. Find month, the units that the whole home uses in $30$ days.
3. Find cost, the bill for those $30$ days, in rupees.