@FXML
    private void handleBtnDeleteAction(ActionEvent event) {
        int selectedIndex = table.getSelectionModel().getSelectedIndex();
        if (selectedIndex > -1) {
            ItemSaleModel model = table.getItems().remove(selectedIndex);
            sumTotalAmount(Integer.parseInt(model.getAmount()) * -1);
            updateItemCounter(Integer.parseInt(model.getQuantity()) * -1);
        }
    }