Greetings,
You want to know how many kWh it takes to dry a load of cloths on high heat and low heat to compare them.
a) turn off major intermittent electric users b) look at your electric meter c)look at your electric meter an hour later d) determine the electrical usage of your house w/o the drier e) run a load of cloths on high heat f) look at your meter, subtract baseline usage to determine kWh-high g) let the drier cool h) look at your electric meter i) run a load of cloths on low heat j) look at your meter, subtract baseline usage to determine kWh-low k) report back to us
Hope this helps, William
PS: If you really want to save money use a gas drier.
you can reassure yourself of the results by running through this procedure twice