Foreign Currency valuation as on 31/3/2011

In a private Ltd. there is foreign currency balance as on 31/3/2011.

US$-600

HK$-455

Euro-755

What is the accounting treatement.?

Also is that like cash balance, so in tally new _______account have to create?

Also is there Link to find out the value on 31/3/2011. i search in google but didnt get the result.

Is there any FEMA regualation have to follow.?

Thanks in Advance.