Array formula on INDEX function not working
........A.........B
1.....1..........2
2.....3..........4
3.....7
4.....12
5.....13
To my surprise, {=SUM(INDEX(A1:A5;B1:B2))} returns 3, and not 15
(entered with Ctrl-Shift-Enter)
Can anybody explain and give correct formula?
Thank you
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