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Amount of energy

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Won't help you this time, but you could join Teslafi.com, it keeps track of all kinds of statistics ....if you do, make sure you read and understand the sleep settings in the app and in your car so your car will sleep properly.
 
Find another SuperCharger refill on your credit card bill... one where you remembered to note the energy. Determine price/energy ratio.

Then, knowing the price paid for any recharge, you can simply scale that price by the ratio determined above to find the energy.