public void ExecuteDellCurrentCashTransactionCommand(object parametr)
        {
            DailyTotalCosts -= CurrentCashTransaction.Money;
            CostsRepository.Instance.DeleteOperation(CurrentCashTransaction);
            DayCosts.Remove(CurrentCashTransaction);

            if (DayCosts.Count > 0)
            {
                CurrentCashTransaction = DayCosts.First();
            }
        }