calculate the order amount, please help !

[Nathali]

Hello,

 

 

On payment, I need to transfer to my credit card proccesor the "amount" value and the currency.

 

So I need to check if the currency that where choosen by the customer is USD then it is ok.

 

BUT.. when the currency that was selected is ILS (Israeli shekel) then I need:

 

to calculate the right amount of the total order. ??

 

for example if 1$ = 5 ILS then what should be the formula to calculate the correct Total of the order ?

 

I hope that someone understand me and could help, please??

 

Thanks a lot !