private double readData(int type, Cell cell) {
		double number = 0;
		switch (type) {
		case Cell.CELL_TYPE_BLANK:
		case Cell.CELL_TYPE_BOOLEAN:
		case Cell.CELL_TYPE_ERROR:
		case Cell.CELL_TYPE_FORMULA:
			number = 0;
		case Cell.CELL_TYPE_NUMERIC:
			number = cell.getNumericCellValue();
			break;
		case Cell.CELL_TYPE_STRING:
			number = Double.valueOf(cell.getStringCellValue());
			break;

		default:
			break;
		}
		return number;
	}