how do I sum the following

if there is "Y" in any of the first 3 columns then take the value in 4th
column, go to next row and if it contains "Y" in any of the first 3 columns
then take the value. and so on.. and give a total of all rows taht contains
"Y"
..

N N N 369192 44258
N N Y 53660 34229
N Y N 150273 12998
N Y Y 1191 423
Y N N 22245 2184
Y N Y 99 36