How to convert Moneybookers charge?

The problem is my statement is in VND, how can I convert to Eur to verify my card in Moneybookers?

 

To convert you have to know
Official exchange rate: this case I used Google to convert and it was success, donot know if Google rate is always righ
FX fee from your bank: this case was 2.5%

Calculation: 41,730.20 VND, including 2.5% -> original charge was 40,696.85 VND -> convert by Google -> 1.51 EURO

And it worked