Please don't make fun of me for what I believe is going to be a simple answer, but I need help understanding and resolving something. I have created a very simple script for the SO_SalesOrderDetail table to find the Standard Cost for an item, calculate the Net Profit % using the Unit Price, and then setting it into a UDF, since the client uses Standard Cost and doesn't care for the Average Cost showing in the Tool Tip area. The calculation works great UNTIL I change the Unit Price. Then the UDF doesn't recalculate. Is there something easy to make this happen upon changes to the Unit Price as well as initial entry? Thanks in advance!