static void AutoAllocateCharges_beforeConfirmPO(Args _args)
{
    PurchTable purchTable;
    PurchFormLetter purchFormLetter;
    Args args = new Args();
    MarkupAllocation markupAllocation;

    select firstOnly purchTable where purchTable.PurchId=='1016-PO-14-000191';
    args.record(purchTable);
    //auto allocate charges
    markupAllocation = MarkupAllocation::newMarkupAllocation(args.record());
    markupAllocation.run(args.parmObject());
    
    purchFormLetter = PurchFormLetter::construct(DocumentStatus::PurchaseOrder);
    purchFormLetter.update(purchTable, purchTable.PurchId);
}