To be able to use this function easily in each case paste this command
into a Visual Basic Project, Macro Module:

Function Factor(Years)
If Years 51 Then
Factor = 2
ElseIf Years 41 Then
Factor = 1.5
Else
Factor = 1
End If
End Function

Therafter you will find this function in Insert Function User
Defined Functions

Alternatively you can use a function in cell:
=IF(A451,2,IF(A441,1.5,1))


Tomek Polak
www.vba.blog.onet.pl