Within Range =

VAR MinDate = MIN( FctoodDelivery[Date] )

VAR MaxDate = MAX( FctoodDelivery[Date] )

RETURN

IF(

    AND(

        Dates[Date] >= MinDate,

        Dates[Date] <= MaxDate

    ),

    TRUE(),

    FALSE()

)

Last Transaction Date =

LASTNONBLANK(Dates[Date], [Total Sales])

First Date =

Min Date = (Min(‘Dates’)[Date])

Max Date = (Max(‘Dates’)[Date])