>>> from aviacio import preu_final

>>> p=preu_final(1200, True, 12)
>>> p
96
>>> p=preu_final(1250, True, 22)
>>> p
120
>>> p=preu_final(2340, True, 22)
>>> p
207
>>> p=preu_final(1200, False, 32)
>>> p
121
>>> p=preu_final(4320, False, 9)
>>> p
345