Originally Posted by
zyxlsy
As I said before, I think Schwab uses FX rate to calculate the amount that is more than the nearest reasonable amount, like 20, 50, 100, etc. The amount is calculated, not directly read from an itemized bill provided by the ATM. What the ATM tells the network is just the total, fees included.
Yeah, these things rely on the fee being less than a valid multiple of a currency.
So you withdraw AUD$50, the bank tacks on AUD$3. Schwab knows you can't withdraw AUD$3, so they treat that as the fee.
Not that difficult. My credit union does this too (though they reimburse as soon as it posts).