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Function introduction ： The first parameter is the value to be searched ; The second parameter is the range to find ; The third parameter is the column number of the value to be searched in the search range ; The last parameter is the logical value （ Exact search or fuzzy search ）

Two 、OFFSET

1、 Exhibition

2、 Cumulative sum

Originally meant before N Sum of items , That is, before the election N term , Then add it together to get the result ; That is, select an area first , and offset What can be selected is the data of a region
At this time, what needs to be determined is how many lines are obtained （ Because it's dynamic ）;
ROW Function can just meet this requirement
So the formula at this time is ：=SUM(OFFSET($B$2,0,0,ROW()-1,1))