My company's accounting software requires that we create Purchase Order Numbers with nine digits starting with the first 5 numbers being the Job Number and the last four digits being an incrementing number starting with 0001. Now, I'm well aware that this an annoying method and if I could use just the record ID #, I would. Unfortunately, I'm trapped with this accounting system requirement. I'm imagining a means in which I use a relationship to count/summaries the number of Purchase Order records associated to a Job and then having an Action stamp that value +1 to a field in the new record. At least, this is the part where I'm getting lost and not sure how to do this last set of steps.