Let's see if my calculation is right :
The most expensive ítem (in Hero Coins) is the Dark Amaranthine Weapon Pack at 375,000 Hero Coins.
Ok ?
1 Hero Coin = 80 NCoins.
So, to get 375,000 Hero Coins must spend 30,000,000 NCoins (375,000 * 80).
Considering that $ 50 we get 4,000 NCoins. To reach 30,000,000 NCoins we should get 4,000 NCoins ...... 7,500 times !!!
$ 50 * 7,500 = $ 375,000
So, 1 Hero Coin is $ 1 (U.S. Dollars).
It's right ?..
Thankz.