Commissions
===========

The head of a bank office sells two different types of products: bank
deposits and preferred stocks. For each product, if the head sells
500.000€ or more, he gains a commission on the total sold: a 0.05% for
bank deposits and a 3% for preferred stocks. If the head sells less
than 500.000€, his commission is 0€.

Write the function :py:func:`commissions` that takes the amount of
bank deposits and the amount of preferred stock (real values) sold by
the bank head, and returns the commission (real) which corresponds to
the bank head.

Save the function into a file :file:`commissions.py`. The function
must pass the following doctest:
   
.. literalinclude:: commissions.txt
      :language: python3
      :lines: 3-

.. note::
      More tests are provided in the :download:`commissions.txt<commissions.txt>` file.


.. rubric:: Solutions

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