public Object getValueAt(int row, int col) {
		Account account = getObject(row, col);
		if (col == 0) return account;
		else if (col == 1) return account.getDebetTotal();
		else if (col == 2) return account.getCreditTotal();
		else if (col == 3) {
			if (account.getSaldo().compareTo(BigDecimal.ZERO) > 0) return account.getSaldo();
			return "";
		} else {// col==4)
			if (account.getSaldo().compareTo(BigDecimal.ZERO) < 0) return account.getSaldo().negate();
			return "";
		}
	}