So, for plugging into a 120V mains there�s the kill-a-watt:

http://www.p3international.com/products/p4400.html

Cheers,
Harry

On Jun 2, 2014, at 8:56 AM, JRodgers <jrodgers113@GMAIL.COM> wrote:

> Please rely off list to my request.
> 
> 
> I am in need of an electrical cost calculator - a box of some type that
> will give me a digital readout of electrical power consumption and total
> cost in dollars of cents for power consumed. Obviously this will need to
> be programmable for cost per kilowatt to readout in dollars. I need to
> plug a piece of equipment into the box and get a readout for each total
> operating period of the equipment.
> 
> Anyone know of these things - or where I might look - or how I might build.
> 
> Please respond off list.
> 
> Thanks.
> 
> John