figuring out energy rate?

I'm trying to figure out how much my energy rate is. All these numbers am I supposed to add up?

Take your total bill amount divide by total KWPH used. Don't include home protection or service plans.
Capacity charge is the rate after a certain amount is used. My capacity is 17KW per day , any KW over that is charged a higher rate.

Be easier to just call the company and ask what price your on for each kilowatt hour. I have a day and night rate where the day is say 25pence a kilowatt hour and the night is say 7pence or something similar.

Then i multiply my rate for kilowatt hours by how many kilowatt hours i use - so 600watt for 12 hours of light is 7.2 kilowatts and multiply that by the rate charged per the time of day.
A 600watt hps cost me about £10 or approx 13$ a week to run.

Now thats a gram a week and my elecy is paid - cheap as chips