It is easy to find out yourself by some simple math. Those numbers change all the time so you can ask the question and the correct answer may only be valid for a very short time.

You can assume a S3 burns what, 600watts? so .6KWH for every hour it runs.

.6 X 24hours a day X 30.5 days = 439.2KWH X .10 = $43.92 per month in power costs

Now go here:

https://bitcoinwisdom.com/bitcoin/difficulty

Put in 450GHS and you will see it reports .129btc per month or 35.69 in usd at exchange rate of 275. Keep in mind these numbers reported are generally 10% over what is usually achieved after you factor downtime, orphans, and other unforeseen factors.

So you can see at .10kwh you will be paying around $10 a month to run your s3, given the price of bitcoin and difficulty stays flat (which it wont)