All type of units total in invoice (compound, simple and alternative)

[System: Formulae]
NosFilter : $BaseUnits:StockItem:$StockItemName="Nos"
KgsFilter : $BaseUnits:StockItem:$StockItemName="Kgs"
DozFilter : $BaseUnits:StockItem:$StockItemName="Dz"
AllQtyTotal : $$String@QtyTotNos + " " + $$String@QtyTotKgs + " " + $$String@QtyTotDoz + " "

QtyTotNos : If $$IsEmpty:$$FilterQtyTotal:InventoryEntries:NosFilter:$BilledQty Then "" Else $$FilterQtyTotal:InventoryEntries:NosFilter:$BilledQty
QtyTotKgs : If $$IsEmpty:$$FilterQtyTotal:InventoryEntries:KgsFilter:$BilledQty Then "" Else $$FilterQtyTotal:InventoryEntries:KgsFilter:$BilledQty
QtyTotDoz : If $$IsEmpty:$$FilterQtyTotal:InventoryEntriesozFilter:$BilledQty Then "" Else $$FilterQtyTotal:InventoryEntriesozFilter:$BilledQty


Sir by this ????????