small correction:

Function mySP(rng1 As Range, rng2 As Range, dec As Integer) As Double
Dim v As Double, IamTheCount As Long
IamTheCount = rng1.Count
mySP2 = 0
For i = 1 To IamTheCount
v = Round(rng1.Cells(i, 1).Value * rng2.Cells(i, 1).Value, dec)
mySP = mySP + v
Next
End Function

--
Gary's Student


"dribler2" wrote:

so short am i not to know the solution..never know the programming language.

anyone know how to make this UDfunction work..

Function mySP(rng1 As Range, rng2 As Range, Optional dec As Long = 2)
mySP = Application.Caller.Parent.Evaluate("SumProduct(Rou nd(" & rng1 * rng2,
dec & "))")
End Function

'syntax =mySP(A1:A100,B1:B100,1) ----SUM OF ROUNDED PRODUCT MADE OF 2 FACTOR
ONLY

happy holidays...
driller.