...I used the following code in my original form and it worked fine. It doesn't work with the form I have now.
Me.Total_ = (Val(Nz(PricePerUnit, 0)) * Val(Nz(QuantityOrdered, 0))) + (Val(Nz(Price_PerUnit_2, 0)) * (Val(Nz(QuantityOrdered_2, 0))) + (Val(Nz(PricePerUnit_3, 0)) *...