@MoiraGoggin it's a manufacuring company with a new CFO that is oriented toward standard cost accounting for PPV and Mfg Variances. So Std Cost Valuation it is... Fortunately, after a 2 hour meeting, it's been determined that the only thing they need the Ser Number for is in sales history so customer service can look up which ser number they purchased. This reduces the number of UDFs needed. Only Invoice History.