This is the way it's posted the Hydro web site:
First 600 kWh per month (adjusted usage - ¢/kWh) $5.50
Additional kWh (adjusted usage - ¢/kWh) $6.70
Thank's Again for any help.
Malcolm

"skateblade" wrote:

In Ontario Canada our hydro has 2 rates.
Im looking for a formula that will calculate my amounts.
The 1st 600KWh per month rate is $5.80 additional rate is $6.70.
Anybody have a formula that will do it.
Thanks