Perhaps this will explain it all
http://www.xldynamic.com/source/xld.SUMPRODUCT.html

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HTH

Bob Phillips

(remove xxx from email address if mailing direct)

"Daminc" wrote in
message ...

Your assumptions were correct but two things still confuse me:

1) Where/When does the addition take place?
2) What does the '--' signify?


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Daminc
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