Having declared "dt" as date constant, how do i incorporate it into
formula involving cell calculation as shown below.

Dim z As Long
Dim dt As Date

dt = 31 / 12 / 2004
z = 2

Do While Range("A" & z) < ""

If Range("A" & z).Value < Range("A" & z + 1).Value And Range("G" &
z).Value dt Then

Range("R" & z).Select
ActiveCell.FormulaR1C1 = "=((dt-RC[-12])+1)*RC[-7]*(RC[-4]/36600"

ElseIf Range("A" & z).Value < Range("A" & z + 1).Value And Range("G" &
z).Value <= dt Then

Range("R" & z).Select
ActiveCell.FormulaR1C1 = "=(dt-RC[-12])*RC[-7]*(RC[-4]/36600"

Else
Range("R" & z).Select
ActiveCell.FormulaR1C1 = 0

End If
z = z + 1
Loop