Need Excel If Condition

Hi there,

Hi I am using Excel 2010,

I have some Country name in Column name 'A' also DEST in column 'B' and amount in column 'C',

So I need

in A22 = SUM(IF(COUNTRYNAME="SINGAPORE" AND DEST="O")
IN B22= SUM(IF(COUNTRYNAME="SINGAPORE" AND DEST="C")

in A24 = SUM(IF(COUNTRYNAM!E="SINGAPORE" AND DEST="O") (NOT EQUAL TO SINGAPORE)
IN B24= SUM(IF(COUNTRYNAME!="SINGAPORE" AND DEST="C") (NOT EQUAL TO SINGAPORE)

How to SUM of above it???