select value from row-1 MS SQL

Question

I have simple code

 

select   duguje as 'Duguje',
potrazuje as 'Potražuje',
(duguje-potrazuje) as saldo
from dbo.nalog_knjizenje_stavke

 Result is

 

 

That is ok, I need to repair my code to be last column 'saldo' next values:

 

saldo(last value) + Duguje - Potrazuje  = need to be result

 

 

Thak you