def acquire_code_tax_number(soup):
	"""
	Take a BeautifulSoup content of a book page.
	Return the code, the price with and without tax 
	and the number available of the book.
	"""
	table = soup.table.find_all('td')
	code_tax_number = {
		'universal_product_code': table[0].string,
		'price_including_tax': table[3].string,
		'price_excluding_tax': table[2].string,
		'number_available': table[5].string,
	}
	return code_tax_number