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Excel data prepare notes

 1) How to calculate memberId?   based on contact numbers...


    open new sheet past contact no into B column and right it down the formula into A column 2nd            row

    =IF(B1=B2, A1+1, A1)


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    2) How to calculate End date using start date and duration?

    open second sheet past start date in A1 and Second column B2 past duration memberships


    =DATE(YEAR(A2),MONTH(A2)+B2,DAY(A2))

note:-



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