u guys got it wrong. its 1usd per item + 15% of the amount transfered to paypal.

eg: sold 1 item usd11 so -1usd by blizzard = usd 10 and then -15% again = usd8.50 total amount sent to your paypal account.

so in this case 11 - 8.5 = 2.5 , and use 2.5/11 x 100 = 22.72% charged by blizzard.