Tim
Several ways - here is one...
If referencing the form, create an unbound text field on the form. Then use a formula...
[tt]
= [Wst] + [FacChrg] + [twash] + [Wgt] + [Stfee] + [Trans] + [Secr] + [Load]
[/tt]
To accommodate missing data, use the Nz function...
[tt]
= Nz([Wst], 0) + Nz([FacChrg], 0) + Nz([twash], 0) + Nz([Wgt], 0) + Nz([Stfee], 0) + Nz([Trans], 0) + Nz([Secr], 0) + Nz([Load], 0)
[/tt]
Richard