how i can calculate if a river call make or lose money ?.....

[andrix]

ok,thanks again.....
now the very complex question....
if i want calculate a flop and turn call ?
example :
at flop i have higmidpair and in unraised pot i call a bet for 1000 times....
i now have to considery what for know if this my action AT FLOP lose or earn money ?
i have to considery in formula preflop cost ?
i have to considery in formula turn and river spent or win money ?