If a 3.5 ton heat pump has a COP of 3.5 at 47 degrees and the cost of a KWH is .o8 cents. Would you divide the .08 by the COP of 3.5 to get .022 per actual KWH used?

There are 3400 btu's in a KWH, if I need 34,000 btu's that is then 10 KWH. Would I divide that 10 by the COP and then multiply by my energy charge?

So 10 KWh X .o8 equals 80 cents per hour or

10 KWH divided by 3.5 (COP) equals 2.85 KWH X .08 equals 22 cents per hour?

Am I on the right track here or not??