Foreign Currency Valuation

Hi Gurus

For FCV plz validate my entries and also plz tell me where in the scene Balance Sheet Adjustment a/c comes .

On 01.03.08

Exp Dr 100

To vendor 100

on 31.03.08 due to rise in EX rate

loss on exchange rate Dr 5

To Vendor 5

on 15.04.08 further rise in EX rate

Vendor Dr 105

Loss on exchange Dr 5

To bank 110

Also plz tell me what is the use of reversal of the entry.