B5:E5=SUM(OFFSET($A2,,MATCH(B4,1:1,)-1,,-3))
B5:E5另解=SUM(OFFSET($B2,,COLUMN(A1)*3-3,,3))
B5:E5另解=NPV(-2,SUMIF($B$1:$Q$1,"<="&EOMONTH(B4,{-3,0}),$B$2:$Q$2))
B7:C7=SUMPRODUCT((YEAR(B1:Q1)=B6)*B2:Q2)
B7:C7另解=NPV(-2,SUMIF($B$1:$Q$1,"<="&EOMONTH(B6&"-12-1",{-12,0}),$B$2:$Q$2))
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