The kilowatthour-meter of a home is read once a month. For a particular month, the previous and present readings are as follows:
Previous reading: 3246 kWh
Present reading: 4017 kWh
Calculate the electricity bill for that month based on the following residential rate schedule:
Minimum monthly charge-$12.00
First 100 kWh per month at 16 cents/kWh
Next 200 kWh per month at 10 cents/kWh
Over 300 kWh per month at 6 cents/kWh