Invoice difference while posting with different currencies

Hi,

The PO has quantity 4.The net price is 28,976.45 SEK.i have done the GR.Now,i am changing the currency EUR in conditions tab of PO.The exchange rate is 0.85176.The amount will be 2964.

while doing MIRO with currency EUR,the amount in the header should be 11856 EUR.But,it is showing in the line detail amount as 10549.34 .

Why this differnece is occuring??

Please help me..

Thanks

Srini