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In Excel, how can I use the SUMIFS function to sum values that occur prior to a certain date. For example, with dates in b5:b15, a cutoff date in b2, and the amounts I want to sum in c5:c15, I can use =SUMIF(b5:b15,b2,c5:c15) to sum amounts that occur on the date specified in b2. But how to sum for all dates occurring before the cutoff date? =SUMIF(b5:b15,"<b2",c5:b15) does not work.
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Answer accepted by question author
Place the cell reference outside the quotes and concatenate it with "<". Use
=SUMIF(B5:B15,"<"&B2,C5:C15)
Perfect! Thank you very much!