Sum column B where column A = Joe OR Sue:
=SUM(SUMIF(A1:A10,{"Joe","Sue"},B1:B10))
=SUMIF(A1:A10,"Joe",B1:B10)+SUMIF(A1:A10,"Sue",B1:B10)
=SUMPRODUCT(--(ISNUMBER(MATCH(A1:A10,{"Joe","Sue"},0))),B1:B10)
=SUMPRODUCT((A1:A10={"Joe","Sue"})*B1:B10)
Array entered** :
=SUM(IF(A1:A10={"Joe","Sue"},B1:B10))
** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
key then hit ENTER.