tabname!23:23 and tabname!$23:23 what does it stand for ?

[rohit23]

=(INDEX(Forecast!23:23,,MATCH(EOMONTH(C$5,0),Forecast!$1:$1,0))/C$2*C$4)+(INDEX(Forecast!23:23,,MATCH(EOMONTH(C$5,-1),Forecast!$1:$1,0))/C$1*C$3)

[zbor]

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[rohit23]

changed it.. is it ok ?

[zbor]

Forecast!23:23 is whole 23rd row in Forceast sheet.
Similarly Forecast!1:1 is first row where are your headers with months.

[rohit23]

thank you