Business Case: Client sometimes delivers supplies via their own truck and if the supply order is billable they want to be sure that they bill the customer a freight charge. So this alert fires if a supply invoice is billed with zero $ freight charge for the shipmethod specified in VariableW.
This alert has 2 Variables:
VarW = ShipMethods on sales order to check for billed freight if order billable (separated by comma)
VarX = BranchNumbers for alert to trigger on (leave blank for ALL)