[Che]

Доброго времени суток.
Добрые люди, подскажите плиз, как (по каким полям) собрать сумму по остаткам?
Метод который собирает количественные остатки:

static InventQty Get_InventDateSum(ItemId _itemId,
                                   InventLocationId _inventLocationId,
                                   InventBatchId    _inventBatchId,
                                   DateStatus endDate
                                  )
{

    InventTrans _inventTrans;
    InventDim   _inventDim;

    // находим количество пришедшее за период
    select sum(Qty) from _inventTrans
    group by ItemId
    where  _inventTrans.ItemId          == _itemId                              &&
           _inventTrans.DatePhysical    <= endDate                              &&
           _inventTrans.StatusIssue     != StatusIssue::OnOrder                 &&
           _inventTrans.StatusIssue     != StatusIssue::Picked                  &&
           _inventTrans.StatusIssue     != StatusIssue::ReservOrdered           &&
           _inventTrans.StatusIssue     != StatusIssue::ReservPhysical          &&
           _inventTrans.StatusIssue     != StatusIssue::QuotationIssue          &&
           _inventTrans.StatusReceipt   != StatusReceipt::Registered            &&
           _inventTrans.StatusReceipt   != StatusReceipt::Arrived               &&
           _inventTrans.StatusReceipt   != StatusReceipt::QuotationReceipt      &&
           _inventTrans.StatusReceipt   != StatusReceipt::Ordered
    join _inventDim
        where _inventTrans.InventDimId == _inventDim.inventDimId &&
        _inventDim.inventBatchId == _inventBatchId &&
        _inventDim.InventLocationId == _inventLocationId;
    return _inventTrans.Qty;
}

а вот по каким полям собрать сумму - не знаю... По CostAmountPosted? Или нет?