Price increase
==============

#. Write function :py:func:`increase` that takes a string, which
   represents the label of a product with the price, and the
   percentage of increase of a product (``float``), and returns
   another string, similar to the given one with the product label,
   but in which the increase has been applied.

   In the given string there is always a sigle colon and the price is
   placed between it and the character '€'. In the returned string the
   price must be represented with two decimals and there must be a
   space between the colon and the price and any character
   between the price and the character '€'.

   Save the function in a file ``increase.py``. Examples:
   
      .. literalinclude:: test-increase.txt
         :language: python3
         :lines: 3-

   .. note::
        More tests are provided in the :download:`test-increase.txt <test-increase.txt>`

   .. rubric:: Solution

   A solution of these functions is provided in the :download:`increase.py <solutions/increase.py>`

#. Write function :py:func:`taxes` that takes a text (string) which
   includes a price and a VAT percentage (``float``), and returns
   another string with the same text but in which the VAT has been
   applied to the price.

   The only digits in the given string are those corresponding to the
   price which is followed by character '€'. In the returned string
   the new price must be in the same place as in the given string,
   represented with two decimals, and followed by character '€'.

   Save the function in a file ``taxes.py``. Examples:
   
      .. literalinclude:: test-taxes.txt
         :language: python3
         :lines: 3-

   .. note::

      More tests are provided in the :download:`test-taxes.txt <test-taxes.txt>`

   .. rubric:: Solution

   A solution of these functions is provided in the :download:`taxes.py<solutions/taxes.py>`